Version 2.4.5

Renamed element.node to element.vnode for clarity.

1. Renamed element.node to element.vnode. This affects Component class, updateComponent.js and patch.js
2. Updated element property definition in Component class to include vnode property.
3. updateComponent function now checks for value of component.element.vnode for patching.
4. patch function stores computed VNode on element as vnode property and passes element.vnode as old VNode value.
5. Renamed node to newNode in patchElement as counterpoint to oldNode.