Removed CanCan as not compatible with Rails 4. Changed migration so URL has to be unique. Added posts/new capybara tests. Added user_spec tests.
Updated Gemfile. Changed model specs to use expect syntax. Added enum to User model
Remove routing and view tests. Update tests to use new rails_helper.rb file. Update gems.
Change ability.rb to use new enum roles
Merge pull request #8 from emson/7_upgrade_rails

7 upgrade rails