basic city serializer. needs more work
added is_capital field to City serializer
added proper serialization to location field
Moved GeometryField to api/fields.py
removed IndicatorSerializer since it is in the wrong place and of no use
until the Indicator backend is fixed
added tests for City serializer and GeometryField
Merge pull request #109 from Murrx/city-serializer-and-view

CitySerializer