1.1.0: Merge pull request #2 from Crustum/1.x

[1.1.0]

Added

• NotifiableTrait for providing notification methods on table classes

Changed

• BREAKING: Refactored NotifiableBehavior - notification methods moved to NotifiableTrait
  • Behavior now only creates the Notifications association
  • Table classes must use both NotifiableTrait and NotifiableBehavior
  • See updated documentation for migration guide