removed rake wrapper task because json dir can be set in initializer. Added initializer and updated _('') to __('') DMPRoadmap/roadmap#204

swapped out all other I18n calls in JS with gettext calls DMPRoadmap/roadmap#204

replaced all of the old I18n('helpers...') references in JS files with new gettext method DMPRoadmap/roadmap#204

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