#9 ensure standards compliance

[Brandon Blackmoor]

1) Test all output for XHTML / CSS standards compliance.

2) Correct deficiencies where found.

3) Add notice to footer stating compliance with relevant standards, possibly with icons from:

http://www.w3.org/QA/Tools/Icons

or

http://www.antipixel.com/blog/archives/2002/10/22/steal_these_buttons.html

I recommend the latter.