[#1454] TrackEvent construction w/ Defaults. Closes gh-304
[#1456] Play two soundcloud clips at once.
[#850208] Perf fix for youtube and Linux. Yay.
Added in String.trim shim for IE8, fails without this.
Formatting fixes
Updated formatting

Replace single quotes with double quotes
Bug 857738 - Null wrapper shouldn't round decimals for durations passed in
Updating current time after checking to fire events
[#889982] Ensure wrappers are included in the correct order.
[#890068] Ended event correction.
[#890301] Moved initial play into play_progress and check loaded progress there instead of another evert for load_progress.
Fix bug 891168 - Remove Twitter plugin
Fix Bug 890556 - Popcorn.smart shouldn't overwrite any existing child elements inside it's container when creating HTML5 media.
[#893957] Remove seek to beginning on ended in youtube wrapper
[#895207] Properly toggle play and paused states.
Revert "[#893957] Remove seek to beginning on ended in youtube wrapper"

This reverts commit 0231f67a801488d34ce91bf513ba03dc131c6483.
[#893957] Remove seek to beginning on ended in youtube wrapper
[#895058] Finally have soundcloud properly ready when we need it.
[#895058] Third time is a charm.
jwplayer on popcorn side, so far.