Merge branch 'hotfix/0.7.2'

* hotfix/0.7.2:
  * Added Rails 3.2.x instruction to Readme * Improved specs
* Tested against Rails 4.0.9 and 4.1.5
* Bumped up version
Merge branch 'hotfix/0.7.3' into develop

* hotfix/0.7.3:
  * Tested against Rails 4.0.9 and 4.1.5 * Bumped up version