fixed kappa in mathtext
support arbitrary colorbar axes and horizontal colorbars
SC 15/01/2004
applied Nadias x,y countour fix
fixedset clip_on bug
reverted pythoninsepct in tkagg
fixed location event bug
Bugfix to allow LocationEvent with x,y=None,None without raising exception. - ADS
Fix typo in FigureCanvasBase.__init__().