Numerous Improvements

This PR brings at least a little more sanity to this project. 
* Precompile times are massively improved.
* Overall structure, particularly in the examples, has been refactored to make this project less complicated.
* All styleguide specific classes that won't actually be used in prod are namespaced under `.sg-*`.
* Lots of superfluous classes and code removed.
* Issues with Bootstrap's grid have been resolved.
* Typographic defaults aren't insane now.