implements MPlayer::getVideoState()

checking to be done
methods MPlayer::getVideoState()

only missing the "closed" state
Merge branch 'feature/play' into develop
Merge branch 'feature/getVideoState' into develop

Conflicts:
	MPlayer.cpp
error VideoAlreadyBeingPlayed
methods play (MPlayer + API)

pb:
- need getVideoState()
- pb with reportError
retrive an include
comments on the play() methods
Merge branch 'feature/play' of https://github.com/heffebaycay/mplayer-plugin into feature/play