Merge pull request #4 from dakota/master

Add children relation to make it easier to create a tree of nodes
Corrects an issue that was causing a generic \Cake\ORM\Table object to be created
Allow custom ACL type class in behavior
Fix failing tests
Use markNew instead of new()
Merge pull request #6 from dakota/patch-2

Fix all failing tests
Fix issue with "Permissions" already exists in registry