Better Sass Documentation 

- Stop outputting comments when there is no code output (vars… mixins…)
- Font-scale documentation is better
- Grid system documentation is better too
- Remove unnecessary 100% font size on the body (which gets overridden by the 1.6em value

If anything needs disambiguation in the Sass codebase, please ask and I'll document it in this PR.

Thanks to @jamesgorrie for pointing that some stuff was not self-explanatory!

![ ](http://s1.developerslife.ru/public/images/gifs/e24278a6-4242-4d02-b8fb-071f64b66e6a.gif)