Update Roles::Controller\Admin to use new acl-has_access syntax
Fix Controller\Base to work with HMVC-requests
Add Validation::exists() to check for existing rows
Fix some bugs in \Gasauth\Login\Gaslogin and Model\Role
Update module/roles to work with Orm\Model_Nestedset
Add custom Asset\Instance to allow for dependencies on assets
Fix some bugs in gasauth models
Add initial version of module/resources
Update module resources to properly set slug on insert
Update module/users to allow setting a user role on registration

@todo: Still need to set a default role for new registrations
Fix seed gasauth/002
Add migration to delete `tree` from `resources`