Add migration for Post
integration test works. Rake task for tests added
Strong params added to PostsController
Remove unnecessary include RR into test framework base class
fix bug with undefined method validates for ActiveRecord::Base:Class by removing require nulldb gem
Unit tests doesn't work, because of error in NullDB adapter. I have to try to fix NullDB for rails 4
Add ActiveRecord to store blog posts, but only integraion tests now works. Problem with NullDB and Rails 4