Upgrade to Capybara 2.1.
Merge pull request #2305 from refinery/capybara_2_0

Upgrade to Capybara 2.1.
Bump factory_girl_rails dependency to ~> 4.2.1.
Refinery::I18n.frontend_locales are always defined.
Moved Refinery module code to lib/refinery.rb
Let 404 page can use "render_with_templates?" method
Merge pull request #2313 from darkbaby123/master

Fix issue - 404 page can not use "render_with_templates?" method
Updated Google Analytics Snippet. Refs issue #2308

The GA snippet has been outdated. The parameter _trackPageLoadTime has been deprecated by Google.
Sites could not be verified by Googles webmaster tools anymore based on the old script.
Merge pull request #2312 from javinto/master

#2308 Google Analytics snippet has been outdated.
Switched out concerns for pure Ruby.
Merge pull request #2314 from refinery/concerning

Switched out concerns for pure Ruby.
Remove leftover require 'active_support/concern'.
Merge branch 'master' into rails4

Conflicts:
	core/lib/refinery/core.rb
Call .to_s on ActiveModel::Name instance in order to call .underscore later on.