Add exercises to Python Basemap notebook
Add exercises to Python Basemap notebook

These exercises worked pretty well at the MIT SWC workshop, so I'm :+1: to merging them.
selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest,selimnairb/2014-02-25-swctest