Front-end setup

AngularJS + Asset Pipeline integration: in development, templates will be served
via XHR request.  In staging/production, templates will be compiled and included
along with the javascript.

Karma test runner + glue:  bundle exec rake spec:js will run javascript specs.

Also added bootstrap 3 + ui.bootstrap for native angular implementation of the
bootstrap javascript.
Merge pull request #1 from jkronz/john/frontend

Front-end setup