Don't generate default metadata value for MySQL. Closes #16
Support for Postgresql JSON column type
Merge pull request #55 from j-manu/json_column_support

Support for Postgresql JSON column type
Allow fallback to Memory adapter on some models that dont requirls that dont require transition persistance
use argument var for adapter_class
test memory fallback and add update Readme
Add contributing.md
Merge pull request #58 from buttercloud/master

Allow falling back to Memory storage on some models
Add Ruby 2.1 to travis.yml
Merge pull request #60 from gocardless/ruby-2.1

Add Ruby 2.1 to travis.yml
Remove broken job link
Merge pull request #61 from nathanl/patch-1

Remove broken job link
Fix readme jobs link
Raise RaceConditionError for race condition failures
Rename error
Merge pull request #64 from gocardless/race-condition-error

Raise RaceConditionError for race condition failures
v0.7.0
RSpec 3
Merge pull request #67 from gocardless/rspec-3

RSpec 3
Fix circle