The server now uses a hacked-together REST-style interface.
Minor cleanup.
Simple hack to make it possible to create new documents from the client.
Added a shitty little text box to the HTML. Maybe use it for input?
Made Sanitize.sanitize fast, and moved Sanitize.main to it's own file.
	Sanitize.sanitize was O(n²) because it was appending to a list in
		a loop.
	Fay didn't like Sanitize.main, and I was using cpp to hide it. Moving
		it into it's own file simplifies things a lot.
[unexpand2] Kill blank leading/trailing blank lines.
cleanup
The top-level url now opens a new timestamped file.
Setup cabal.