Bug 167450 [DataBinding] Get rid of bind support factory magic
I finally realized that we don't need that other magic factory. I'll move fillBindSpecDefaults() and the methods it calls (createConverter, createValidator etc) to a new class DefaultBindSpec. Clients who want default validators and converters created for them just create a DefaultBindSpec as opposed to a (rather empty) BindSpec. I will also move the early type checking into DefaultBindSpec to make it optional as well.
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/DataBindingContext.java
*            The binding to add.
	 */
	public void addBinding(Binding binding) {
		bindings.add(binding);
		binding.setDataBindingContext(this);
	}
	/**
	 * Removes a listener from the set of listeners that will be notified when
	 * an event occurs in the data flow pipeline that is managed by any binding
	 * created by this data binding context.
	 * 
	 * @param listener
	 *            The listener to remove.
	 */
	public void removeBindingEventListener(IBindingListener listener) {
		bindingEventListeners.remove(listener);
	}
	/**
	 * Updates all model observable objects to reflect the current state of the
	 * target observable objects.
	 * 
	 */
	public void updateModels() {
		for (Iterator it = bindings.iterator(); it.hasNext();) {
			Binding binding = (Binding) it.next();
			binding.updateModelFromTarget();
		}
	}
	/**
	 * Updates all target observable objects to reflect the current state of the