Remove UserDefaults and registering "if needed"
Unregister token
Code cleanup
Build JSON with custom "user" property
Optional Completion handler for register method.
Corrected log messages
Merge branch 'daniel/json_change' into dev

* daniel/json_change:
  Corrected log messages
  Optional Completion handler for register method.
  Build JSON with custom "user" property
  Code cleanup
  Unregister token
  Remove UserDefaults and registering "if needed"
Nomenclature alterations
Merge branch 'dev'

* dev:
  Nomenclature alterations
  Corrected log messages
  Optional Completion handler for register method.
  Build JSON with custom "user" property
  Code cleanup
  Unregister token
  Remove UserDefaults and registering "if needed"
Updated pod spec and README