Add, remove or update and existing certificate

Updated for testing (for now)
This will eventually be run periodically and/or server
as a way to generate certificate requests from the commandline

Adding, removing and updating certs

Conflicts:

	lms/djangoapps/certificates/models.py

Get node.js from a more up-to-date PPA.

Feature/ned/quieter tests

Put the coverage data files in the reports dir, where they will be treated like the disposable things they are.

Split out requirements that come from the local mitx repo and those that come from github, and upgrade the local requirements before running tests

Simple Pearson Testing

Add support for subtitle download link

Change AUTH_TOKENS index reference to a get so it doesn't explode the whole app if I did Puppet incorrectly.

Ugly, ugly hack needed so that Pearson can test something today, to be replaced by a real implementation later this week or early next.

Taking out MySQL-python for now because it requires mysql to be installed, so breaks updates on content folks' envs.

Re-add TestCenterUser along with a basic command to make an entry for a given user already in the system.

revert to using getElementsByClassName in .dialog b/c jQuery was