remove deprecated createfigure calls.
Replace corrupted versions from cvs transition.
Added set_axes_limits call to imshow method to ensure aspect ratio preserved.
Added DeprecationWarning to createfigure
Updates for 0.8.3
Remove deprecated creatfigure
fixed bug related to setting gc state and clipbox, unmasked draw_markers
masked draw_markers
Fixed two bugs in ticker.py; now bar([0,1], [0,0]) works again.