Convert pop-ups to browser windows

I've taken the approach of having links open a new `target="_blank"` window in the form /odisees?key=val, having the /odisees check on page load if it has any GET parameters, and if so, replacing the content of the page with the result of an Ajax request.

I didn't add any error handling for the GET parameter-parsing. They just get forwarded on to the server as-is. This doesn't introduce any security holes that weren't already there, but makes the chance of user error a bit higher (modifying a URL is easier than modifying Ajax calls).

I've only tested this in Chrome.