CreateRegistationId + Upsert approach applied
ADM support implemented
CreateRegistrationId+Upsert - all tests passed for GCM
Kindle detection fix
API version update
User-Agent unification
Merge pull request #2 from efimovandr/master

Amazon Kindle Fire support. CreateId/Upsert API support. E2E tested by Hitesh, Andrey and ElioDa.