With AVPlayerViewController

[addbrick]

Adds AVPlayerViewController to be used instead of the AVPlayerLayer. This is a first pass which satisfied my use case. Not sure if it is the right direction or overkill, mainly wanted the loading functions.

Other fun things added:

• Implements error handling delegate from another pr Add error handling to delegate #172
• Update playbackState when the _avplayer starts playing or pauses
• Update build target to iOS 10.0

To Finish:

• Don't call or create playerLayer or _playerView when useNativeUI is true
• Probably some other clean up

To Add:

• Fullscreen detection event (to allow enable/disable of orientation change)

[piemonte]

@addbrick you're awesome, thanks for the improvements. the changes look good, will do another pass and merge in soon.

[piemonte]

hey, i haven't forgotten about these requests, they've blossomed, so it's more for me to review. would like to merge them in, will probably make a few changes after doing so. thanks again.

[piemonte]

merged commits to master, backed out and/or modified a couple changes