seancribbs/ripple — pull request #275 by myabc (2012-02-23 19:35:53+00:00)
Title: Rails 3.2 support

The following commits should get the spec suite running green on Rails 3.2.

Issue #258 should also be fixed with this Pull Request.

I could do with some feedback, particular with reference to `AttributeMethods#method_missing?` where I just went with what works, rather than spending too much time poring over Active Model's implementation changes.