Plug-in vn-product-option component

Could probably use a @jasoncovington pass on this one for styling. I have yet to introduce button states though. I have to work on the components to make that happen.

![product-options](https://cloud.githubusercontent.com/assets/1058243/2934217/586420e4-d7cc-11e3-9c9c-fdb683e7e38f.png)