Added this.registerBindings.  Accepts additional bindings to be added to the binding provider's binding list.
Added this.registerBindings.  Accepts additional bindings to be added to the binding provider's binding list.

Allows for bindings to be added by individual modules loaded later that need to be able to bind their own bindings in their own ko instance.

rniemeyer/knockout-classBindingProvider,rniemeyer/knockout-classBindingProvider