Consolidate and reorganize assets

Scripts had been scattered across pages and many were inline. Furthermore, nothing was getting minified or concatenated. This is particularly a problem now that ember apps (and dependencies) are included on the home page.

These commits consolidate and reorganize most of the scripts throughout the site. Minification options have been activated for builds.

Due to the dynamic / custom way that the example apps are loaded and displayed on the home page, I've left the structure of them alone. However, these could be further optimized later.