matplotlib Code

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.

added polar bar char demo

added polar bar char demo

some polar fixes

some polar fixes

reword warning in contour/contourf

applied patch by Manuel Metz to backend_agg.py to fix draw_ellipse call

add warning to contour/contourf

fix comment.

print warning if x not montonically increasing in contour, contourf
(global projections only)