Modified embellishing a plot,loading data from files,plotting data.

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#	modified:   embellishing_a_plot/slides.org
#	modified:   embellishing_a_plot/slides.tex
#	modified:   loading_data_from_files/script.rst
#	modified:   loading_data_from_files/slides.org
#	modified:   loading_data_from_files/slides.tex
#	modified:   plotting_data/script.rst
#	modified:   plotting_data/slides.org
#	modified:   plotting_data/slides.tex
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