Supported Rails 4 and Refinery 3.0.0.dev
Merge branch 'master' into rails4

Conflicts:
	app/helpers/refinery/blog/controller_helper.rb
	app/models/refinery/blog/post.rb
Use proper dependencies. Now we can bundle install.
Cleanup Gemfile and depend on relased version of friendly_id.
Use strong parameters.
Get rid of load_tasks which doesn't work anymore.
Replace selenium with poltergeist.
Use newest version of filters_spam which doesn't produce a ton of deprecation warnings.
Merge pull request #368 from refinery/rails4

Rails 4 support.