add ability to do failure testing. If a post passes in a '?fail_at=<num_bytes>' then the middleware will throw an exception

add a new cms ENV configuration to use a slow upload file handler to help test progress bars in uploads

support uploading and referencing assets as streams rather than having to read everything into memory first

Felix/hinter2

Admin table for course creators.

Provide a null log function for OpenID to keep it from spewing during tests

Don't display docstrings when talking about tests, use real test names.

Added baseline Sphinx-generated documentation

Conflicts:
	common/lib/xmodule/xmodule/crowdsource_hinter.py