axes.py: fix Axes.pcolorfast (style == "pcolorimage") to allow RGB(A) data (version 1.0.0)

mpl version 1.0.0

file: axes.py
line: 7214

<<<
         nr, nc = C.shape

···

===
         nr, nc = C.shape[:2]
>>>

...................

While you are at it, you could also change line 6759

             numRows, numCols = C.shape

to

             numRows, numCols = C.shape[:2]

(still some other things further down then crash, but this [second fix] is a start on that)

A lot more work will be needed to make everything (_pcolorargs, PcolorImage, pcolorfast,...) work with RGB(A) arrays. How do I get a password/user name to check you the svn sources so I can send in patches in a more useful way? Just sign up for the devlop mailing list?

-Alexander