matplotlib Code

Update to use modern Numpy C API

Further speed improvements. Quadmesh extension code (still not as
fast as the old version, for various reasons.)
Fix bugs in quadmesh masking in PDF and PS backends.

update Copyright

add Shapely as a Requirement.

use nice colors for ocean and land

add hires.py example.

update high-res dataset install instructions.

updated for new boundary files

remove debug code

fix Antarctic polygon closing code