Update to Ruby 2.0 and Rails 3.2

everything except app/
Index page working
Show tweets of one user
Added ActiveAdmin
More ActiveAdmin models, cleanup
Fetch tweets from twitter.com
Update user data from Twitter
Batch action to update user data
Twitter authentication
Asset compilation
Added custom ActiveAdmin css to asset precompilation
Added 'Fork me on GitHub' ribbon
Added translation with ms-translator
translate only when needed
Repair bad translations
ms-translator initializer
Merge branch 'major_update_to_ruby_2_and_rails_3_2'