Feature/kevin/pinning inline

Make updates to the MatlabInput InputType

when updating the list of children of sequentials, we must use the 'dire...

Correcting placeholder text for grace period field in course settings

when updating the list of children of sequentials, we must use the 'direct' store otherwise we end up with draft revisions of sequentials, which is bad

Press Releases: generic matching rule instead of explicit lines in url.py

* Hide "Test Code" button after we check the problem
* Only set the state of the problem to 'queued' if we have successfully
queued the problem
* Unit tests for bugs and new functionality

Upgrade lettuce and factory boy versions, fix CMS lettuce tests to run under phantomjs or tag them to skip

Feature/will/textline template test