- Remove absolute URL's from stylesheets and javascripts
- Handle prefix in LinkListBlock
- add Noosfero.root method as a central data source

The application server needs to be started with the
RAILS_RELATIVE_URL_ROOT environment variable set to the desired prefix.

In development, this can be tested with

  # assuming /social prefix
  $ RAILS_RELATIVE_URL_ROOT=/social thin --prefix /social start

For production, see INSTALL.md