Prevent mousemove spam

Some platforms produce frequent mousemove events whether or not the mouse has moved. This causes the UI to always be displayed since userActive_ is always `true`. By keeping track of the last mouse position and only firing if the new position is different, we can eleminate the event spam.
Array traversing for children opts - closes #1070
Fixed some formatting issues & added .each doc
Replaced webkitRequestFullScreen with webkitReplaceFullscreen
Fixed canPlayType patch tests on Android
Made findPosition return rounded values to fix Android tests
Removed a low value test that was causing a hang in testing
Exported upatchCanPlayType and moved tests to api.js
Fixed the release type ID placement in contrib.json
Release 4.5.0
Removed dist files
Fixed canPlaySource export that got lost in last release
Added line to the changelog
Release 4.5.1
Merge branch 'stable'

Conflicts:
  dist/video-js/video-js.css
  dist/video-js/video-js.min.css
  dist/video-js/video.js
Removed dist files
Basic UI for Live

Squashed commit of the following:

commit 2c5d4d523e2e1f3a1bcdafda292d6a0ebea7a200
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Tue Apr 1 15:02:37 2014 -0700

    update control text for liveDisplay component

commit 10f21cc2a09b6823a73fae4cf1881490f9038d30
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Tue Apr 1 12:23:20 2014 -0700

    whitespace fix

commit 6a093d67989479f63ed4ac6bdddd5d1a3d0b08bb
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Tue Apr 1 12:21:42 2014 -0700

    remove window scope of infinity

commit 2dd8284bd3c7b2c7692a78563c3cfe9558f25ab4
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Tue Apr 1 12:12:13 2014 -0700

    update to fix infinity capitalization. only do css logic on valid duration. set any duration of less than zero to window.Infinity

commit f940bef8b50156c5b8fcd969c9b5d39be9fe5589
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Tue Apr 1 10:01:27 2014 -0700

    update to less than zero on player durationChange

commit 554c003dac640b7a658355cd46b6ab146cf50b24
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Mon Mar 31 17:26:13 2014 -0700

    update exports, fix tests

commit 2fb10cb06a65c3f91342563bfa925d9a472ede33
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Mon Mar 31 13:39:00 2014 -0700

    fix tests, remove update display list in LiveDisplay

commit bc47c5ed67e036c79067ebc6666b310fd0b68d04
Author: Tom Johnson <seniorflexdeveloper@gmail.com>
Date:   Mon Mar 31 13:13:43 2014 -0700

    Basic UI for Live
Added line to the changelog
Making sure that the title element gets placed into the UL element

Included are two sanity check tests for the two areas being checked
to make sure that the menu title items are being correctly placed
in the actual UL element of the menu.

Fixes #1107
Reset player on source change. closes #1050 closes #1124