[Maypole] XHTML-izing the factory templates

[brian@alternation.net]

Hello All,

I've begun work to ensure that the factory templates will output valid
XHTML Strict 1.0 screens. The results so far can be seen here:

http://www.alternation.net/maypole/

At this point, I would be surprised if any pages were valid, but we're
getting closer. To start the process I've:

+ Added a doctype to the header
+ Included the language (en)
+ lowercased the HTML tags
+ quoted all attributes
+ ensured all tags are closed

At some point I'll go through a sample, default maypole installation and
validate all of the pages and fix up the templates as needed.

Note that I've not touched the css, and any future changes will most
likely required the relevant css bits to be updated.

-Brian