Maker: serve via existing app routing, add navbar.

This means that the new Maker page can be an EZT template, so I've
converted it to use the existing head/foot/etc pieces.

Also added a navbar to the bottom of the Maker view, to make it
consistent with the other pages.
Don't specify domain name in Analytics code.
Add deploy instructions to README.

This is so I don't forget you have to deploy from 'build'...