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

We no longer need override_settings, Django has a better one.

Feature/victor/raw static files

- regexp was too complicated, didn't work

- needed for GWT'ed modules that rely on the filename to find dependencies

bug 155

Bug 180

add exporting of grading_policy.json

Fix/cdodge/dangling discussion modules

Fix "staff debug" so it only appears where useful, instead of everywhere

Make type check for self.code a little more robust,

Make type check for self.code a little more robust, give default val for mmlans so it's never undefined