apprtc/main.js: removed redundant JSHint directives
Minor tweaks to JSHint directives and comments
Added MediaStreamTrack to .jshintrc global
Addition to .jshintrc global array
renamed global to globals, added MediaStreamTrack, moved to end of file
Added createIceServer
Changed global to globals as per #159
Merge pull request #155 from samdutton/master

Minor JSHint tweaks: .jshintrc and apprtc/main.js
merge master
Merge pull request #159 from GoogleChrome/fix.jshintrc

.jshintrc - Renamed global to globals, added MediaStreamTrack, moved to end of file
Changed .jshintrc to use globals object, not array (to work with Grunt JSHint plugin)
Fixed .jshintrc curly brace indent
Merge pull request #166 from samdutton/master

Changed .jshintrc to use globals object, not array (to work with Grunt JSHint plugin)
Added Structual SIMilarity calculation in a JS file. Used for checking
SSIM between contiguous frames in a near-frozen frames subtest of
camtest.js.
Minor remarks
Merge branch 'cameratest_detect_frozen_frames' of https://github.com/GoogleChrome/webrtc into cameratest_detect_frozen_frames