Fixes #261 - parameters now use a single reference_id

This implementation uses STI but the table looks the same for all
variants. This is a little strange but it seems to work.

Also removed obsolete controllers and tests
Added more tests

fixes #323 - Add a "cancel build" option

Change puppetrun output to flash message

fixes #315 - Newlines slipping into dynamic partition table layouts

fixes #316 - Show custom partition tables by default if set

fixes #318 - users page does not sort based on last login

fixes #270 - host show page looks bad on IE or old versions of firefox

Fixes #308 - Added action to destroy multiple hosts at once.

fixes #305 - puppetclass importer should try harder

welcome should be a protect method, refs #273