Fix another self imposed syntax error
Use Unicorn as server for everything

Before this we had a very strange setup using passenger with
a nginx being the middleware for an apache server.

We stop this madness; we now use unicorn for the entire
application, including the static files (performance is not
really an issue).

We remove the thin and the unicorn gems. Also the commented
forman gem oO
Always use sqlite

We had been using mysql but performance is really not an
issue and this makes maintenance easier.

We remove the mysql2 gem (mentioned twice oO) and some
commented lines from the gemfile.