Add DJANGO_SETTINGS_MODULE to wsgi environment settings
Convert to use Foundation 4

This makes the project use Foundation 4 instead of Bootstrap.  Documentation
on it can be found here:

http://foundation.zurb.com/docs/

This does require Ruby to be installed, as well as:

gem install compass
gem update zurb-foundation

Then SCSS can be compiled using compass in the main HedyNet directory (config.rb being alongside manage.py).