Mapping To Existing Models

[jaredswarts55]

I wrote some mapping options that allow you to use knockout.mapping and map data to existing classes. Does this idea have any place in this codebase? Here is the code. I imaging it would have to be reworked heavily:
https://gist.github.com/jaredswarts55/9811856

It will cascade the json data into child properties as well if they have an extend with a typeMapper on it.

Example:
http://jsfiddle.net/bvg52/5/