fix bug with unprepared statements to sql in Rails 4
fix a spelling error in spec_helper
Merge pull request #367 from rsl/master

Fixed bug with Rails 4 and association#to_sql
Merge pull request #383 from ktdreyer/spec-helper-spelling

fix a spelling error in spec_helper
Add Code Climate badge to repo README

Add Code Climate badge to repo README
Merge pull request #421 from mrb/master

Add Code Climate badge to repo README
Add missing unique indices
Switch to simpler migration structure via Engine, Thanks @parndt
Rails needs to be loaded to meet all gem dependencies
No need to monkey with load path in gem, add to tests
Use ActiveSupport hooks to lazy-extend/include rails classes