Remove unused HAML and Mustache templates

* Also remove server-side-rendered tooltips
Comment out several unused chunks of Javascript
Merge branch 'develop' into feature/cruft-removal
Removing unused controllers and app scripts
Refactored model class files into models folder, and split up simple_models.js
Removed commented out code; restored reset functionality for request filter
Removed unused mustache helpers
Moved control and category models to models folder
Removing unused code from control and category models
Removed mapping controller
Removed unused add_widgets controller
Removed unused sha1.js library
Merge pull request #1323 from reciprocity/feature/cruft-removal

Remove unused files and features from the JavaScript assets