Ignore nested log files

Generated by tork with logdir option.
Use PostgreSQL for dev and test databases

This will make things much quicker and ensure that the same database is
used in dev and prod.  Will require installing PostgreSQL on your
development machine and re-creating the database (rake db:setup).
Springify binstubs

https://github.com/rails/spring#walkthrough

    $ bundle exec spring binstub --all