[Implemented] Wiki banners

[Matthew East]

After a very productive discussion yesterday on IRC with Connor and
Marc, we made a list of the various things that need to be done in
relation to the transition to tags, and I've drawn up the following
"todo" list in relation to the transition to the Tag system.

https://help.ubuntu.com/community/WikiToDo/Tags

It should be clear enough that anyone can dive in and start helping
with this. If it isn't, or I have missed something, please post here!

-- 
Matthew East
http://www.mdke.org
gnupg pub 1024D/0E6B06FF