Revert "Keep track of URLs for history"

This reverts commit 4d4adcc82c0a661e399341ab620c63d9420865ff.

Conflicts:
	src/js/app.js
Revert things
Revert "Revert "Revert commit beb4085""

This reverts commit fcb75e098ad12f6f840c9d6a24370fb59817f3e5.