Refactor as Backbone App

[hotzenklotz]

Refactor the frontend as a single page Backbone app.

Frontend:

• User View
  • [x] Backbone.View
  • [x] connected to REST API
• Project View
  • [x] Backbone.View
  • [x] connected to API
• Team View
  • [x] Backbone.View
  • [x] connected to REST API
  • [x] calculate total sum
• Admin view
  • [x] Backbone.View
  • [x] connected to REST API
• Log view
  • [x] Backbone.View
  • [x] connected to REST API
• [x] use Backbone.Router
• [x] add URLs with dates for quick access
• [x] add app object with initializers

  Backend:

• [x] highlight correct navbar item on page load
• [x] deliver repositories via REST
• [x] deliver currently active aka currently tracking repositories via REST

Log Time