restructring repo

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diff --git a/lecture-notes/latex/workbook/bibtex.rst b/lecture-notes/latex/workbook/bibtex.rst
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+BibTeX
+~~~~~~
+
+The previous section explained the process of listing references at the end of a document and embedding cross references. In this section let us explore the BibTeX environment for keeping track of references.
+
+Using BibTeX is a very convenient method to use, when writing multiple documents in a single area or field. BibTeX allows you to create a database of all your references and use them as and when required. 
+
+The BibTeX database is stored in a ``.bib`` file. The structure of the file is quite simple and an example is shown below. 
+::
+
+  @book{Lamport94,
+  author    = "Leslie Lamport",
+  title     = "A Document Preparation System: User's Guide and Reference",
+  publisher = "Addison-Wesley Professional",
+  year      = "1994",
+  edition    = "second",
+  note      = "illustrations by Duane Bibby"
+  }
+
+Each bibliography entry starts with a declaration of the type of the reference being mentioned. The reference is in the above example is of the book type. BibTeX has a wide range of reference types, for example, ``article, book, conference, manual, proceedings, unpublished``.
+
+The type of reference is followed by a left curly brace, and immediately followed by the citation key. The citation key, ``Lamport94`` in the example above is used to cite this reference using the command ``\cite{Lamport94}``. 
+
+This is followed by the relevant fields and their values, listed one by one. Each entry must be followed by a comma to delimit one field from the other. 
+
+To get your LaTeX document to use the bibliography database, you just add the following lines to your LaTeX document. 
+::
+
+  \bibliographystyle{plain}
+  \bibliography{LaTeX}
+
+Bibliography styles are files that tell BibTeX how to format the information stored in the ``.bib`` database file. The style file for this example is ``plain.bst``. Note that you do not need to add the ``.bst`` extension to the filename.  If you wish to achieve a particular style of listing the bibliography items and citing them, you should use an appropriate style file. 
+
+The ``bibliography`` command specifies the file that should be used as the database for references. The file used in this example is ``LaTeX.bib``
+
diff --git a/lecture-notes/latex/workbook/example1.tex b/lecture-notes/latex/workbook/example1.tex
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+\documentclass{article}
+\begin{document}
+This is my first LaTeX document. 
+\end{document}
diff --git a/lecture-notes/latex/workbook/example10.tex b/lecture-notes/latex/workbook/example10.tex
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+\documentclass{article}
+\begin{document}
+This is my simple document with nested lists. 
+\begin{enumerate}
+\item First Enumerated Item. 
+\item Second Enumerated Item. 
+\item Third Enumerated Item. 
+  \begin{itemize}
+  \item First Item.
+  \item Second Item.
+  \item Third Item.
+    \begin{itemize}
+    \item First Sub-Item.
+    \item Second Sub-Item.
+    \item Third Sub-Item.
+    \item Fourth Sub-Item.
+    \end{itemize}
+\end{enumerate}
+\end{document}
diff --git a/lecture-notes/latex/workbook/example2.tex b/lecture-notes/latex/workbook/example2.tex
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+\documentclass{article}
+\title{Python}
+\author{Wikipedia}
+\maketitle
+\begin{document}
+Python is a general-purpose high-level programming language whose
+design philosophy emphasizes code readability. Python aims to combine
+"remarkable power with very clear syntax", and its standard library is
+large and comprehensive. Its use of indentation for block delimiters
+is unusual among popular programming languages.
+
+Python supports multiple programming paradigms, primarily but not
+limited to object oriented, imperative and, to a lesser extent,
+functional programming styles. It features a fully dynamic type system
+and automatic memory management, similar to that of Scheme, Ruby,
+Perl, and Tcl. Like other dynamic languages, Python is often used as a
+scripting language, but is also used in a wide range of non-scripting
+contexts. 
+
+The reference implementation of Python (CPython) is free and open
+source software and has a community-based development model, as do all
+or nearly all of its alternative implementations. CPython is managed
+by the non-profit Python Software Foundation.
+
+This content is from Wikipedia's Python page. 
+\end{document}
diff --git a/lecture-notes/latex/workbook/example3.tex b/lecture-notes/latex/workbook/example3.tex
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+\documentclass{article}
+\begin{document}
+Python is a general-purpose high-level programming language whose
+design philosophy emphasizes code readability.[3] Python aims to
+combine "remarkable power with very clear syntax",[4] and its standard
+library is large and comprehensive. Its use of indentation for block
+delimiters is unusual among popular programming languages. 
+
+Python supports multiple programming paradigms, primarily but not
+limited to object oriented, imperative and, to a lesser extent,
+functional programming styles. It features a fully dynamic type system
+and automatic memory management, similar to that of Scheme, Ruby,
+Perl, and Tcl. Like other dynamic languages, Python is often used as a
+scripting language, but is also used in a wide range of non-scripting
+contexts. 
+
+The reference implementation of Python (CPython) is free and open
+source software and has a community-based development model, as do all
+or nearly all of its alternative implementations. CPython is managed
+by the non-profit Python Software Foundation.
+
+This content is from Wikipedia's Python page. 
+\end{docment}
diff --git a/lecture-notes/latex/workbook/example4.tex b/lecture-notes/latex/workbook/example4.tex
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+++ b/lecture-notes/latex/workbook/example4.tex
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+\documentclass{article}
+\title{A Glimpse at Scipy}
+\author{FOSSEE}
+date{2010}
+\begin{document}
+\maketitle
+SciPy is open-source software for mathematics, science, and
+engineering.   
+\end{document}
+
+
diff --git a/lecture-notes/latex/workbook/example5.tex b/lecture-notes/latex/workbook/example5.tex
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+\documentclass{article}
+\begin{abstract}
+  This content is from Wikipedia page on Python. 
+\end{abstract}
+\begin{document}
+Python is a general-purpose high-level programming language whose
+design philosophy emphasizes code readability. Python aims to combine
+``remarkable power with very clear syntax'', and its standard library is
+large and comprehensive. Its use of indentation for block delimiters
+is unusual among popular programming languages.
+
+Python supports multiple programming paradigms, primarily but not
+limited to object oriented, imperative and, to a lesser extent,
+functional programming styles. It features a fully dynamic type system
+and automatic memory management, similar to that of Scheme, Ruby,
+Perl, and Tcl. Like other dynamic languages, Python is often used as a
+scripting language, but is also used in a wide range of non-scripting
+contexts. 
+
+The reference implementation of Python (CPython) is free and open
+source software and has a community-based development model, as do all
+or nearly all of its alternative implementations. CPython is managed
+by the non-profit Python Software Foundation.
+\end{document}
diff --git a/lecture-notes/latex/workbook/example6.tex b/lecture-notes/latex/workbook/example6.tex
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+%hello.tex - First LaTeX document
+\documentclass[12pt]{article}
+
+\title{LaTeX}
+\author{The FOSSEE Team}
+\date{August 2010}
+
+\begin{document}
+\maketitle
+\tableofcontents
+
+\begin{abstract}
+This is a sample document to be used in the STTP course for a quick introduction to \LaTeX
+\end{abstract}
+
+\section{Introduction}
+LaTeX is a typesetting program used to produce excellently typeset documents.
+
+\section{Structural Elements}
+Let us now look at giving a better structure to our document. 
+
+\subsection{documentclass}
+The \verb+documentclass+ variable tells \LaTeX, the type of document we wish to prepare. 
+
+\subsection{Sections, Chapters and Parts}
+We shall first look at how to divide the document into Sections, Chapters and Parts. 
+
+\subsubsection{Appendices}
+I can't tell you how to add an appendix, in the main document. 
+
+\end{document}
diff --git a/lecture-notes/latex/workbook/example7.tex b/lecture-notes/latex/workbook/example7.tex
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+\documentclass{article}
+\begin{document}
+This is my first LaTeX document. 
+\begin{equation}
+  a^2 + b^2 = c^2 
+\end{equation}
+\[
+\begin{pmatrix}
+\alpha& \beta^{*}\\
+\gamma^{*}& \delta
+\end{pmatrix}
+\]
+\end{document}
diff --git a/lecture-notes/latex/workbook/example8.tex b/lecture-notes/latex/workbook/example8.tex
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+\documentclass[english]{beamer}
+
+% generated by Docutils <http://docutils.sourceforge.net/>
+\usepackage{fixltx2e} % LaTeX patches, \textsubscript
+\usepackage{cmap} % fix search and cut-and-paste in PDF
+\usepackage{babel}
+\usepackage[T1]{fontenc}
+\usepackage[latin1]{inputenc}
+\usepackage{listings}
+\usepackage{amsmath}
+\lstset{
+  language=TeX,
+  basicstyle=\small\ttfamily,
+  commentstyle=\ttfamily\color{blue},
+  stringstyle=\ttfamily\color{orange},
+  showstringspaces=false,
+  breaklines=true,
+  postbreak = \space\dots
+}
+
+\usepackage{ifthen}
+\usepackage{longtable}
+\usepackage{array}
+\setlength{\extrarowheight}{2pt}
+\newlength{\DUtablewidth} % internal use in tables
+
+\mode<presentation>
+{
+  \usetheme{Warsaw}
+  \useoutertheme{infolines}
+  \setbeamercovered{transparent}
+}
+
+
+\title{\LaTeX}
+\author[FOSSEE] {FOSSEE}
+\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT
+  Bombay}
+\date{}
+
+%% Delete this, if you do not want the table of contents to pop up at
+%% the beginning of each subsection:
+\AtBeginSubsection[]
+{
+  \begin{frame}<beamer>
+    \frametitle{Outline}
+    \tableofcontents[currentsection,currentsubsection]
+  \end{frame}
+}
+
+\AtBeginSection[]
+{
+  \begin{frame}<beamer>
+    \frametitle{Outline}
+    \tableofcontents[currentsection,currentsubsection]
+  \end{frame}
+}
+
+\begin{document}
+
+% Document title
+\begin{frame}
+  \maketitle  
+\end{frame}
+
+\section{Introduction}
+
+\begin{frame}
+  \frametitle{\LaTeX~- Introduction}
+  \begin{itemize}
+  \item Typesetting program
+  \item Excellently Typeset Documents - specially Math
+  \item Anything from one page articles to books. 
+  \item Based on \TeX
+  \item Pronounced ``Lah-tech'' or ``Lay-tech''
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{This Course}
+  \begin{itemize}
+  \item Look at Sample document - \texttt{sample.pdf}
+  \item The document will be produced by the end of the course. 
+  \item First Hour - Basic Structure
+  \item Second Hour - Text, Tables, Figures, References
+  \item Third Hour - Math, Bibliography, Presentations
+  \end{itemize}
+\end{frame}
+
+
+\begin{frame}
+  \frametitle{A Look at the Sample Document}
+  \begin{itemize}
+  \item Title, Author, Date
+  \item Abstract
+  \item Sections
+  \item Subsections
+  \item Appendix
+  \item References/Bibliography
+  \item Tables
+  \item Figures
+  \item Math
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{The source \& compilation}
+  Write the following code into the file \texttt{draft.tex}.
+  \begin{lstlisting}
+    \documentclass{article}
+    \begin{document}
+    SciPy is open-source software for mathematics, 
+    science, and engineering.   
+    \end{document}
+  \end{lstlisting}
+  To compile the document, do the following in your terminal: 
+  \begin{lstlisting}[language=bash]
+    $ pdflatex draft.tex
+  \end{lstlisting}
+  This produces the output file \texttt{draft.pdf} %%$
+  Note: \texttt{latex} command is often used to get \texttt{dvi}
+  output. Throughout this course, we shall use \texttt{pdflatex} to
+  compile our documents to \texttt{pdf} output.
+\end{frame}  
+
+\section{Structure of the Document}
+
+\begin{frame}[fragile]
+  \frametitle{\lstinline+documentclass+}
+  \begin{itemize}
+  \item \LaTeX~typesets based on \lstinline{documentclass}
+  \item Defines structure and formatting of a document
+  \item \LaTeX~is a document based mark-up
+  \item Mark-up --- a system of annotating text, adding extra
+    information to specify structure and presentation of text
+  \item Document based markup $\rightarrow$ you don't have to worry
+    about each element individually 
+  \item Allows you to focus on content, rather than appearance.
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Environments and Commands}
+  \lstinline{document} is an environment, present in every document. 
+  \begin{itemize}
+  \item Environments
+    \begin{itemize}
+    \item \lstinline{\begin} and \lstinline{\end} define the beginning
+      and end of an environment
+    \item All the content of the document is placed inside the
+      \lstinline{document} environment 
+    \end{itemize}
+  \item Commands
+    \begin{itemize}
+    \item All commands begin with \textbackslash
+    \item They are case-sensitive
+    \item Only alpha caracthers; other characters terminate commands
+    \end{itemize}
+  \end{itemize}
+\end{frame}
+
+
+\begin{frame}[fragile]
+  \frametitle{Top Matter}
+  Let's add the Title, Author's name and the date to the document.
+  \begin{itemize}
+  \item Add title, author and date. Compile. Nothing changes.
+  \end{itemize}
+  \begin{lstlisting}
+    \title{A Glimpse at Scipy}
+    \author{FOSSEE}
+    \date{June 2010}
+  \end{lstlisting}
+  \tiny{See \texttt{hg} rev1 of draft.}
+\end{frame}
+\end{document}
diff --git a/lecture-notes/latex/workbook/example9.tex b/lecture-notes/latex/workbook/example9.tex
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+\documentclass{article}
+\begin{document}
+This document contains a figure. 
+The figure \ref{fig:lion} is a drawing by Duane Bibby. 
+\begin{figure}
+\centering
+\label{fig:lion}
+\caption[CTAN Lion]{CTAN lion drawing by Duane Bibby; thanks to www.ctan.org}
+\includegraphics[scale=0.8, angle=30]{lion_orig.png}
+\end{figure}
+\end{document}
diff --git a/lecture-notes/latex/workbook/lion_orig.png b/lecture-notes/latex/workbook/lion_orig.png
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