Adds project-specific scripts for AJAX

Adds functions for rendering and fetching content and a binding to call
those functions
Adds handlebars for templating
Returns users inside a 'users' object
Adds affordances for rendering via templates
Removes stubbed roles fetching

This was being interpreted by Handlebars even inside a comment.
Restructures for Angular
Changes path for UserList resource
Renames to users.html
Adds route for user management
Injects users
Changes resource path to new path set in Flask
Fixes path for first partial
Pluralizes name
Returns user JSON without a wrapper
Injects ngRoute
Adds code to indexController
Renames service
Specifies ng-app module
Removes old Jinja template code
Refactors as an angular view