Deployment improvements

* don't use `-e` for repository-based packages in requirements.txt
* add patch to always force noauth_local_webserver in AppEngine SDK,
  since some tools can use it but don't support the command line switch
Don't use database-triggered updates on `created_at`, `updated_at`
Update docs

* remove unnecessary commands from ``Quick Start``
* explain what ``vagrant provision`` is doing in relation to Python
  virtual environments and ``packages.zip``
Change usage of str#format() to be compatible with Python 2.6