Refactor sharing.js
Merge branch 'master' of https://github.com/seanxiaoxiao/tinyplayer

Conflicts:
	player.js
playlist sharing API
Merge branch 'master' of https://github.com/seanxiaoxiao/tinyplayer
Merge branch 'master' of https://github.com/seanxiaoxiao/tinyplayer

Conflicts:
	player.js
Activate file sharing