matplotlib Code

remove uneeded set_axes_limits call from imshow method.

make more interactive friendly (code stolen from pylab.py)

added optional 'ax' parameter to Basemap methods.

Added optional 'ax' keyword parameter to most Basemap methods so
an existing axis instance can be used (default is ax=None, which
means existing axis instance will be used).

some work on agg swig wrapper

moved tex caching to class level

Had to explicitly remove previous bitmap image reps

Refactored nib and backend for cocoa to work with multiple figures/windows.

Add mouse and key interaction to the cocoaagg

SC