Update asset structure with webpacker gem

moved assets from app/assets to lib/assets. The files in lib/assets will be used by Rails unless override by an equivalent file in app/assets. Added logic to applicationController so that it will look first for a template in app/views/[:branded folder name] before using the default in app/views

Master (#7) ...

* Update license (merging Marta's change that added Univ. of Glasgow to the text)

Update license to include University of Glasgow.

* Added API and Localisation work

API development done by Sam Rust - xsrust
Localisation work done by Damodar Sojka - DamodarSojka