Improved Build Functions

This is a general update to the build capabilities of Gluten. Highlights
include:
-Style headers by splitting it into a 3 column table
-Underlined citations disappear, replaced with the appropriate format
-Added more framework functions to support content formatting
-Improved fullscreen so that you can now exit it if you wish
-Pages now have lines marking the page split, and now render properly
when going to print
-General Bug Fixes