added macros, travis and gitignore

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+function at=gftrunc(a)
+//This function is used to truncate the higher order zeroes in the given polynomial equation
+
+//Calling Sequence
+//AT=GFTRUNC(A)
+    
+//Description
+//A is considered to be matrix that gives the coefficients of polynomial GF(p) in ascending order powers
+//A = [1 2 3] denotes 1 + 2 x + 3 x^2    
+//AT=GFTRUNC(A) returns a matrix which gives the polynomial GF(p) truncating the input matrix 
+//that is if A(i)=0, where i > d + 1, where d is the degree of the polynomial, that zero is removed
+    
+//Examples
+//A= [ 0 0 1 4 0 0] returns [0 0 1 4]
+//c = gftrunc([0 0 1 2 3 0 0 0 4 5 0 1 0 0])
+
+    
+//See also
+//gfadd, gfconv, gfdeconv, gfsub, gftuple
+
+//Authors
+//Pola Lakshmi Priyanka, IIT Bombay//
+
+//*************************************************************************************************************************************//
+// Check number of input arguments
+[outa,inpa]=argn(0) 
+
+if inpa~=1 then
+    error('comm:gftrunc: Invalid number of input arguments')
+end
+
+[row_a,col_a]=size(a);
+if row_a~=1 then
+    error('comm:gftrunc: Input argument should be a row vector')
+end
+    for j=1:col_a
+        if ( abs(a(1,j))~=a(1,j) | floor(a(1,j))~=a(1,j) )
+                error('comm:gftrunc:Elements Of A should be Positive Integers');
+        end
+    end
+at=a;
+for i=col_a:-1:1
+    if a(1,i)~=0 then
+        break;
+    else
+        at=[at(1:i-1)]
+    end
+end
+endfunction