Added comments to code in:
  - AcceptDeclineInviationActivity
  - AddContactActivity
  - AddEmergencyContactActivity
  - ConnectionDetector
  - Contact
  - ContactDetailsActivity
  - ContactRowAdapter
  - EditOrganizationActivity
  - EmergencyContact
  - EmergencyContactDetailsActivity
  - EmergencyContactRowAdapter
  - ExitGeoFenceNotificationActivity
  - GPSTracker
  - GroupGeoFencyMapActivity