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 #6112 - log/test.log disappears when running under spork

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 #5941 - Handle nil comparison object in DHCP::Record.valid?

fixes #5826 - Using dots in kickstart template names or hostgroups causes routing errors

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

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