Added travis-ci build status to readme
Added rubinius (1.9 mode) to build matrix
Refactored serializable_hash

Better matches the activerecord adapter in carrierwave core
Removed email notifications from travis-ci
Bumped version to 0.3.1
Upped dependency on carrierwave to ~> 0.8.0

Closes #84
Bumped version to 0.4.0
only one only :)
Merge pull request #85 from luizkowalski/master

typo
Fixed a comment mistake
Merge pull request #86 from qinix/master

Fixed a comment mistake
Added license info the gemspec
Added ruby-version to the gitignore
Added gem version badge