You can provide feedback on the pages on this site.

If a page has no other comments, there will be a link "comment on this page". Otherwise, a link "read comments on this page" will lead to existing comments, where you will be able to "add your comments".

Logging in

In order to contribute to this site, you need to have an OpenID account. Many online identity providers offer OpenID services. If you have an account with one of the following sites, stick the corresponding URL into the "Log in with OpenID" box when asked to do so:

Otherwise, you can sign up for one with:

Learn more about OpenID here:


At the moment, pages are written in "markdown" syntax.

Briefly: three or more dashes on a single line are turned into a horizontal rule; Quote someone by prefixing text with '>'; Get a monospace font by prefixing lines with four or more spaces; stick email or web addresses inside angle-brackets (< and >) to auto-link it; prefix lines by asterisks to turn them into bullet-points.

For a more complete description of markdown, visit