added functionality to save figure plots as gif easy

lib/save_as_gif.m

+function fig_handle = save_as_gif(filename, fig_handle, first_run)
+%SAVE_AS_GIF saving given figure in fig_handle to gif animated file
+%   filename: target file (Example: 'test.gif'
+%   fig_handle: figure, that should been saved (fig_handle = figure(1))
+%   first_run: indicate, if the current image is the first, that will been
+%   saved to the animated gif (1 if first)
+    figure(fig_handle);
+    if first_run == 1
+        axis tight manual % this ensures that getframe() returns a consistent size
+    end
+    drawnow;
+    frame = getframe(fig_handle); 
+    im = frame2im(frame); 
+    [imind,cm] = rgb2ind(im,256); 
+    %Write to the GIF File 
+    if first_run == 1 
+        imwrite(imind,cm,filename,'gif','Loopcount',inf); 
+    else 
+        imwrite(imind,cm,filename,'gif','WriteMode','append'); 
+    end 
+end
+