Implementing suggested fix for #7

I experienced the exact problem discussed in #7 when using the client v 0.1.0 and 0.1.1.  The client worked fine until I tried to change any property (color, etc) in the UIView that contained the YTPlayerView and then the issue would arise.  Thanks to @Anislav for coming up with the solution.  Please include and release a 0.1.2 version.  Thanks much!