Ruby and gem pinning
Remove test.sqlite3
rails 4 compatible visitors method signature
remove depracation warnings
Lots of stuff
Ignore lock files
Rails 3.0 is too hard to support
Multiple DB tests on travis.
Removing explicit socket, for travis and others

...also a ruby upgrade, and change from `RAILS_DB` to `DB` var name
Allow failures for 4.2 RC
Adding CodeClimate
Version bump and SemVer in README