Use UMD (#299)
Use UMD (#299)

* Use UMD intro

* Fix possible issue with variable hoisting

tv2/videojs-ima,valse/videojs-ima,valse/videojs-ima,ypavlotsky/videojs-ima,tv2/videojs-ima,shawnbuso/videojs-ima,googleads/videojs-ima,shawnbuso/videojs-ima,ypavlotsky/videojs-ima,googleads/videojs-ima