Javascript Prototypes is a prereq for OOP

According to the pre-reqs section at the top of the [OOP page](http://javascriptissexy.com/oop-in-javascript-what-you-need-to-know/), the Javascript prototypes should be completed first. Anecdotally, it certainly made it clearer to me.
Merge pull request #535 from hbaughman/patch-7

Javascript Prototypes is a prereq for OOP