Merge pull request #656 from planemad/mongokit

CSS updates
Implementing security check on discussion feature
Make node history a tabbed item
Update bower to download latest release of foundation
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
Move tabs to new row
already existing translations removed from select option
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
Merge pull request #657 from supriyasawant/mongokit

Existing translations removed from select option.
Merge branch 'mongokit' of http://github.com/gnowledge/gstudio into mongokit-forum
Implemented 'group-member' & 'login' check in discussion
Merge pull request #658 from kedar2a/mongokit-forum

Implemented 'group-member' & 'login' check in discussion
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
Reorder sass imports for multiple themes
Remove text from logo
Hide extra apps only if there are 5 or more apps
Update css filenames
New files for nroer theme
Optimize nroer logo from 2.4mb to 10kb