Final touches on SDK for Release Candidate 1

[atsakiridis]

I quickly copied this from Android SDK, so many of them will have to change:

Review all aspects of the SDK and make sure it is GA quality. Some things to check:

• API is in good shape
• CI/CD facilities are complete and 100% functional from Travis CI
• UI/Integration/Unit testing are complete with 100% passing tests, also automated testing in real devices (using external service like Amazon farm) would be great.
• Interoperability testing between all SDKs would be a plus, but not sure if it can be realized yet, as the rest of the SDKs might not yet be ready.
• Documentation is up to date and with some improvements so that it is easier to read (also all documentation should reside in this repo, not Restcomm-Connect):
  • Reference Documentation
  • Quick start guide
  • User guide for Olympus
• Olympus App and Hello World sample app both functional. Olympus should be verified by UI tests, but not sure about Hello World -maybe we could introduce a rudimentary set of UI tests for this as well.
• Libraries in RC should all be release type and as lightweight as possible
• All dependencies are stored in Sonatype and visible to public. The repository should have no local dependencies.

Also do a round of very thorough testing:

• Do some more testing on Notifications functionality + integrations with Android Contacts + Calls as they aren't tested enough as far as I know
• Test UI/UX aspects to fix any left overs that might have slipped our attention.
• Manually test interoperability in various types of calls within Android Olympus:
  • Video -> Video
  • Video -> Audio
  • Audio -> Video
  • Audio -> Audio
• Manually test interoperability between Android, iOS and Web Olympus