Better way to include the embedder source.

This way lets us include uncompressed scripts, which makes debugging a
lot easier.

Fixed a bug where we were not getting the transcript source, because
we were trying to get it from the local instance.  But place the
subtitles are actually stored is amara.org.
Fix timing for the transcriptviewer popcorn elements (#855)

This fixes highlighting things in the transcript and also click to
seek.
Changed embedder test URL
Make embedder use current site rather than always amara.org
Handle subtitles not being available for the widget. (#856)

In this case we replace "loading..." with "no subtitles available"
Made the amara button work for videos not yet on amara (#856)

Made the button go to the create page if the video is not on amara.

Changed the text "No subtitles available" to "Video not on Amara".  I
think this is clearer.
Load controls when showing the embedder
Move embedder to the top of the demo page
Slightly better error handling when a language is not available

We now display empty text in the subtitles selector instead of
"loading...".  Also fixed the code to display "no subtitles available"
in the transcript section.
Upgraded zepto to 1.0-1
Implemented initial search code in the transcript viewer

Stopped using the amaratranscript popcorn plugin.  It was getting a
bit weird to my mind because some things were done in the plugin, some
things were done in the backbone view, sometimes the plugin would call
a method on the backbone view.  I think it's simpler to have the
plugin simply control the CSS class of the current line and the code
plugin work fine for that.

Refactor the way we initialize the backbone views/models to
consolidate things.  The new system is loadSubtitles ensures the
subtitles have been fetched for a given language, then calls
setCurrentLanguage().  This is nicer since all the setup code is in
one place.
Implemented moving forward/back in the transcript viewer search
Center transcript viewer subtitles (#855)
New styles for the transcript viewer (#855)
One more tweak for the current subtitle box shadow (#855)
Add 3px padding between buttons on the transcript viewer.
Show subtitle times as tooltips (#855)
Updated search styles for the transcript viewer (#855)
Fixed time formatting in the transcript viewer
Merge branch 'staging' into gh-855