fixes #5708: #nil? is now an allowed method inside of Host and Token jails

fixes #5652 - run parse_args when calling new_vm for compute profiles

fixes #6091 - menu removal wasn't traversing menu hierarchy

fixes #6116 - search hosts by parent host group and its decendants

Fixes #6117 - clean usergroup cache

Dependent destroy was missing on through association from user side.

Fixes #5810 - fixes issue with incorrect page titles

fixes #5834 - Hosts: . in the name is invalid - user is told this but the UI adds one anyway

fixes #6030 - update list of VMware guest types

fixes #5963 - fix Role has_permission? function

fixes #5869 - permit accents in user names on Ruby 1.8