Revert "Revert "Merge pull request #236 from arthurnn/bump_devise""

This reverts commit 31123ecda7df722bfda629e55b7432ac86283b14.
We have	to set config.secret_key for Devise 3.2.2 as our app is	migrated manually.
Reference - https://github.com/plataformatec/devise/issues/2554#issuecomment-22181594
Set devise secret key as our app is migrated manualy to Rails 4

- Ref: https://github.com/plataformatec/devise/issues/2554#issuecomment-22181594
Merge pull request #238 from prathamesh-sonpatki/bump-devise-with-secret-key

Bump devise with secret key