Header and Footer

This enables you to put any XHTML code in front and after of the actual board, i.e. you can 'frame' all the board pages.

Limitations

Both the header and the footer have to contain self-contained well-formed XML. That means you can't leave a tag open in the header even if you close it again in the footer. This is a purely technical limitation (hint: the SimpleXML class is used to build the tree internally, so we're talking about construction using nodes, not just strings) right now - if you're the adventurous type, feel free to provide a patch to change this behaviour.