Save the model x and y values of a kinetic node separately so view can alter

This affects other properties: position, transform, absolutePosition, absoluteTransform.  I "unimplemented" some getters and setters that didn't actually have kinetic API functions backing them up.  We can implement them when they become necessary.
Merge pull request #339 from virtual-world-framework/branch/preserve-kinetic-model-position

Save the model x and y values of a kinetic node separately so view can alter