Merge pull request #2 from jgomezdans/master

GDAL Python bindings
python101 start
Added reprojection and rasterisation all in one
Merge branch 'master' of github.com:profLewis/geogg122
exercise 2.1
new exercises!
updates to notes
Updated the file to contain a good masking example
Added a national parks json file that can hopefully be rendered in github...
Merge branch 'master' of github.com:profLewis/geogg122
Merged new approach to masking and using vector data