allow computed properties to be used as overloaded getters and setters by passing parameters through when called via get/set on enyo.Objects and sub-kinds

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>
transforms should be called under the context of the binding's owner if it exists and now a third parameter is passed to transforms that is a reference to the binding and in order to stop propagation of the binding call binding.stop() instead of this.stop()

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>