Added setContext for calls that require one
Initial Location context information grabbing
Moved geoLocation to a separate HashMap

- Added geoLocationPairs HashMap
- getSubjectLocation returns the above map
- TODO: Add the SubjectLocation to another SchemaPayload
  - Re-create Tracker class
  - Implement location stuff in completePayload
Minor change the Subject class constructor
Added CHANGELOG
Added setLocation to setContext and code line alignment
Calling super in Subject
Re-added TargetApi annotation

- Prevents Android Lint warnings from failing the build
Added Tracker Version to 'andr'

- Fixes #11
Added javadocs to extended Tracker
Added carrier to Subject