Updated version restriction for devise, updated rails to 3.2.15, devise to 2.2.7, railties to 3.2.15, activerecord to 3.2.15, activeresource to 3.2.15, actionmailer to 3.2.15, actionpack to 3.2.15, activemodel to 3.2.15, activesupport to 3.2.15, multi_json to 1.8.2