.jshintrc - Renamed global to globals, added MediaStreamTrack, moved to end of file

Renamed global to globals (https://github.com/jshint/jshint/blob/master/examples/.jshintrc) so jshint picks it up.
Added MediaStreamTrack to globals.
Moved globals to the end of the file and applied " Three words per line rule" ;).
Add "createIceServer".