FEAT(templatizing): templatize entire app

add in minimally necessary changes to templatize app:
* replace <%= with <%%= in Gruntfile and all grunt/ files
* replace refs to appName (since the angularjs app is just
  called 'app' this is only necessary in a few places) in
  app/index.html title, and server mongo config
* add .htaccess file (not yet tested)
* remove injected from index.html: bower:css, bower:js, injector:js