matplotlib Code

Numpification new try: dont touch numerix/, but make mpl code independent of it.
(Including conversion to "import numpy as npy")
Complete except for pylab.py and mlab.py

reverted numerix breakage, with apologies

completed numpification of most trivial cases

converted many non-numpy relicts

remove trailing spaces

added tims proj3d patch

added back the missing nx methods (cross and diag are not in numarray), debugged plot_surface

some 3d speedups

fixed proj3 clipping

fixed proj3 clipping