PlayerVars as parameters in loadVideoID

[abritopach]

Hello @gilesvangruisen,

I imagine you are busy but you could check this PR in order to be able to pass the parameters you want when playing the video.

https://developers.google.com/youtube/player_parameters

By this way, it would be very simple to show the video in full screen mode for example.

let playerVars = ["playsinline" : 0] as AnyObject?
youtubePlayer.loadVideoID(videoId, playerVars)

Anything else, let me know.

Thank you very much!