Revert "Merge pull request #6 from jimsiff/wip/bgDelta"

This reverts commit a5a3236273a70a81113d1cdaa1488e1eaecdbddc, reversing
changes made to dcb10c0756e531b140ecb39405a35cfb27fd1e6e.

Conflicts:
	static/css/main.css
	static/js/client.js