fix rake task markus:reset
Merge pull request #1466 from oneohtrix/master

fix rake task markus:reset
fix failing submission tests
Merge pull request #1470 from oneohtrix/master

fix failing submission tests
Merge branch 'master' of git://github.com/MarkUsProject/Markus into sass-r2
Initial implementation of mobile friendly menu. Mobile header works as intended, and content is pushed over to the right when menu is open. Just need to rearrange the menu items better and style everything nicely.
All menu items are shown now. Background colour was lightened up to increase contrast.
Menu items fairly consistant. (Note this aimed for the student view only, it may not look that great for admins and TAs)