Need support for Exo Library and maybe other media libraries

[lenguyenthanh]

This library is awesome, but it needs a little more flexible. People may want to use this with some other media libraries such as ExoPlayer.

[sungerk]

i think so

[brucetoo]

Different Players may have different ways to handle complex play state, but the author already has interface for us to custom MediaPlayer,what us need to do is adapt to it