acceptance-rebase-20140926: Update cached test DBs - lettuce & bok_choy
acceptance-rebase-20140926: Fixed imports for discussion SCSS.
acceptance-rebase-20140926: Load internationalization of CourseMode lazily.

Fixes broken test running, since non-lazy evaluation creates an importError.
Merge pull request #263 from open-craft/acceptance-rebase-20140926

Acceptance rebase 20140926