Update README.md
- redesign state machine
- removed Suspended state. maintain any additional states in a subclass.
- redesigned control flow
- fixed a state machine bug
- Tweaked control
- Added hooks for ad playback
Merge branch 'refactor'

* refactor:
  - Tweaked control - Added hooks for ad playback

Conflicts:
	Classes/ios/VKVideoPlayer.m
- state machine bug fix
- State machine fixes
- added a loading state to the end of scrubbing
- updated README.md
- changed suspended state name
- added control events for play and pause to allow users to add custom actions
Update CHANGELOG.md
- removed should change state delegate (users should not interfere with the state machine)
Merge pull request #1 from viki-org/master

Update from original