Hide the Comments Service API key during logging.

Added unit tests for safe_key() to resolve bug 392.

Vik/fix/oe bugs

Delete two lines.  without this, the xblock fields are never created in cases where the module is "fresh" (ie has no existing data)

Feature/giulio/accessibility

these are configured to be too long in the settings.

made signup form labels and close modal button accessible friendly and tweaked login form to match signup form

Pass additional field information from editable_metadata_fields, remove system_metadata_fields variable.

Ignore the js files that are compiled from coffeescript when running the...

Updated safe_key() so that it: (a) avoids creating keys that
are too long for memcache, and (b) handles unicode in keys, prefixes,
and versions

Added __init__.py, which should have been in the last commit

Pep8/Pylint fixes

Change the methodology to ignore .js files by default. Any .js files that are coded can be handled individually.

Fix tests that intermittently fail when run in concurrent jobs on jenkins.

This was previously done for input but not textarea.