Major app overhaul

  * major visual refresh (closes #16)
  * enabled *simple* copying of feature services: it copies a reference to the original hosted feature service, but does not actually republish the service in the destination account (closes #58)
  * removed storage quota from stats page since there is no quota for Organizational and Portal accounts
  * updated third party libraries
  * added Grunt for automating build process
  * added changelog
  * tagged first major release for 1.0.0