Fence and Coordinates

Added Fence. Coordinates are number instead of strings
Resolves ST-89

Known issue: Locations and Fences belonging to a patient
are not destroyed when that patient record is destroyed.
Improved patient API tests.
Added DELETE method + tests.
Merge pull request #7 from knotsoftware/patient-details

Fence and Coordinates
Merged additional patient details.
Added location GET/POST methods.
Fixed error in tests.
Merged with angular-maps