646 - Add less documentation to demo pages.

In this branch, I performed the following:

* Removed references to styleguide
* Added less documentation tab to the demo page

I will squash the commits once the PR is approved.
We'll probably be making a ton of changes here in the near future, but I think that `See the .less file for examples` can be removed. If we're doing our documentation right, the examples will be on the page and explained.