yang-binding artifact currently has all the interfaces thrown into one package, org.opendaylight.yangtools.yang.binding.

We need to split them into three packages based on their purpose:

• base user-visible concepts: DataObject, InstanceIdentifier, RpcService,...
• structural enforcement interfaces: ChildOf, Augmentation, Augmentable, etc.
• run-time support interfaces: DataObjectSerializer, etc.

These all need to exist in one bundle and the packages need to be referenced from each generated package due to OSGi classloading rules.

Finally we need a yang-binding-util, which will provide things for tools dealing with the binding spec itself – BindingMapping and similar.