Finishing touches:

• Added documentation
• Added sample apps
• Implemented scoping via CoroutineScopes
• Added Rxjava 1 and 3 plugins
• Allowing nullable events where possible (excluding RxJava 2 and 3)
• Container create lambdas now take the initial/restored state as a parameter
• Removed the need to register DSL plugins manually
• Allow running the onCreate lambda in tests
• Various improvements
• Dependency updates