removing unused templates
minor code review
Sluggable moved to QuickApps\Model namespace
implementing the [t] hooktag
minor tamplates review
related to 951974b91104454ea700680d551045b11f59e03b
minor code review
(un)install tasks now regenerates ACO tree

- uninstaller task now automatically removes any ACO related to the
plugin being removed
- in the other hand, installer task automatically analizes the plugin
being installed and extract ACO paths from its folder structure