Upgrade Rails Version to 3.2.21

Fix [CVE-2014-7829](https://groups.google.com/d/msg/rubyonrails-security/rMTQy4oRCGk/loS_CRS8mNEJ)
Merge pull request #68 from boxen/rm-uppgrade

Upgrade Rails Version to 3.2.21
Merge remote-tracking branch 'source/master' into update-to-latest
Merge pull request #5 from Ferocia/update-to-latest

Update to latest