Fixed bugs. Removed unnecessary things from HTML5. Minor improvements. Subtitles now work in HTML5 if specified.

Fixed bug with jumpy timeline when switching speeds. Enabled show_captions option. Added JS support for subtitles in HTML5 mode.

Updated all coffee scripts to define and use Alpha version of classes. Added missing functions for HTML5Video.Player prototype. Now bare bones works without errors. YouTube version also works without errors.

Adding HTML5Video class and modifying coffee sources to use it when video sources are provided instead of YouTube IDs.

Fix broken test and don't pass time units as strings but as ints.

Feature/julian/multiple choice tweaks

lms required grace period fields to be in specific order

On 32-bit Python, this conversion could overflow, for example, for year 2099.  This conversion won't.

change timer to calculate relative duration in javascript

When checking types to convert data, don't forget about longs.  32-bit Pythons make longs from values that are ints on 64-bit Pythons.

Conflicts:
	common/djangoapps/util/converters.py

Resolving an LMS sidebar accordion issue in IE7

fix showing less than and greater than in code