Change database name to be more Trasto-specific
Add Pry as development dependency
Expect hstore keys to be strings, not symbols

I think this is due to the hstore implementation
being used in Activerecord 4 rather than the gem.

This fixes many bugs with AR4.
Remove I18n.enforce_available_locales warning
Add Appraisal gem, set up for Travis
Ignore all gemfile locks