Merge branch 'upgrade_to_rails_4.1' into 'master'

Gemfile

Gemfile.lock

app/controllers/projects_controller.rb

app/controllers/snippets_controller.rb

app/models/snippet.rb

app/views/snippets/current_user_index.html.haml

config/environments/production.rb

config/initializers/acts_as_taggable_on_patch.rb

config/initializers/state_machine_patch.rb

spec/helpers/submodule_helper_spec.rb

spec/models/system_hook_spec.rb