This reverts commit 4a229898.

Conflicts:

	media/css/styles.css

This is a fairly broad commit that restructures the box model of the
page. Changes in elements are interdependent and thus could not be
atomized.

Every template, python and html file was in the root folder. Now there
is a src folder with templates; running make generates html files in the
build folder. This also simplifies 'make clean'.