Literate rewrite

This pull request converts every "*.el" file I have into a ".org" file that has lisp source code blocks.

The change is inspired by Sacha Chua's post from about a year ago: http://sachachua.com/blog/2012/06/literate-programming-emacs-configuration-file/.

Not everything has been converted, and what's not converted lives in `to-be-converted/`.