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- Disabled if DEBUG is set to False
- Configurable using WEBPROJECT_SERVE_STATIC
- To avoid the need of each synnefo django application to add new url
  entries for serving its own static files.

since the url that changes the user session language was moved in webproject
as an app wide url, the view that gets bind to the url should exist also
in webproject.

- new package snf-webproject
- moved basic django related settings in snf-webproject
- added new entry point utils to ease the extension mechanism of
  snf-webproject (urlpatterns, middleware, static_files, installed_apps)
- setup.py changes to keep up with the new entry points

since more than one packages exist in repository root