Revert "Fix for corner case of booking template with nil title; fixes feature spec with leftover booking template."

This reverts commit c741caceadd621b551aeaeee6b9780ffef02eb87.
Fix fixtures cleaning for feature specs.
Increase log level on CI.
Use poltergeist and phantomjs for JS rspec features.
Add jquery-ui-rails gem.
Drop unused jquery.meio.mask plugin.
Use .on instead of deprecated .live in addNestedFormBehaviour().