slider works correctly
correct slider's behavior
fixed with workaround
added changes
remove spaces in KSPlayerVC
_playbackObserver leakage fixed
removed spaces, fixed playbackObserver's release
removed big space in notification
removed spaces in playAudio:(KSAudio *)
playbackObserver memory mngment
seekToTime with completion block. removed workaround
updated
setCurrentTomeObserver with (BOOL)needToSet
fixed duplicate code
Merge remote-tracking branch 'origin/master' into bugfix/blinking-slider

Conflicts:
	KSVKPlayer/PlayerViewController/KSPlayerViewController.m
Merge pull request #28 from Kazberovich/bugfix/blinking-slider

slider works correctly