Release 1.0

[sergejsha]

API refinement

• [x] Make onEnter non suspending
• [x] Add non suspending on<Event>
• [x] Add getExtra and setExtra methods
• [x] Add support for multiple handlers for the same event (to be used in delegates) & main handlers
• [x] Rename launch into launchInState to distinguish it from coroutine's launch

Tests

• [x] Add tests for updateState {}
• [x] Add tests for transitionTo {}
• [x] Add tests for onEnter {}
• [x] Add tests for onExit {}
• [x] Add tests for onSequential<Event> {}
• [x] Add tests for onConcurrent<Event> {}
• [x] Add tests for onLatest<Event> {}
• [x] Add tests for onSingle<Event> {}

Runtime validation

• [x] Prevent from adding multiple handlers of the same event type (with tests)
• [ ] Prevent already started comachine from starting again (with tests)

Documentation

• [ ] Add DSL documentation
• [ ] Create quick reference - a single page documentation describing all features

Configuration

• [x] Configure release upload to maven
• [ ] Configure CI build & tests
• [ ] Update README.md

Composition

• [x] Add DSL and implementation for machine composition
• [x] Add documentation
• [x] Add tests