Added Kube CSS framework to project

More information available at http://imperavi.com/kube/

Also re-worked Gruntfile.js to handle .less files and removed un-used
JSON /data folder.
Slight tidy-up of Login screens

Added some basic Kube styling to test out the new framework.
Merge pull request #316 from adaptlearning/added-kube-framework

Added kube framework