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

Applied Paul's pick restructure pick contains patch

remove trailing spaces

ported unit support to bar, errorbar, vlines and hlines

Fixed a bug in units.py where is_numlike was iterating over a list and calling
is_numlike with the list as the parameter instead of the individual value. This
was actually not returning correct values when a list was passed in.

Modified axis.set_unit to not attempt to determine the converter to use based
on the specified unit since a unit is not necessarily an instance of the type to
be converted. The removed lines were made redundant due to a previous submission.

Fixed previous set_ticklabel modification.

Modified 'set_ticklabels'. This did not appear to actually set the tick labels.
This could be demonstrated with a 'set_ticklabels' immediatly followed by a 'get_ticklabels'
and they would not match.