matplotlib Code

print error message if can't open boundary datasets

Fixes to drawmapboundary method.

fix minor bug when printing version number of required matplotlib

if resolution=None, no boundary data is needed (requested by Andrew Straw).

Updates for new set_aspect syntax

Fixed bugs found by Jim Boyle

Changed 0.8.3 to 0.9.

Added set_axes_limits call to imshow method to ensure aspect ratio preserved.

Added DeprecationWarning to createfigure

added special-case polar-centered versions of stereographic, lambert-azimuthal
and azimuthal-equidistant ('npstere','spstere','splaea','nplaea','spaeqd',
'npaeqd')