add robinson and sinusoidal examples, fix verbage in azeqd example.
Committing CHANGELOG
Clear rcParams state between documentation plots.
Fix custom scales in pcolormesh (thanks, Matthew Turk)
bug fixes - edgecases
added mollweide example
Add agenda for 2008 SciPy tutorial, plus misc. updates to scripts.
fix numpy, ma imports in geo.py
O(n) implementation of Grouper.__iter__
added findobj