Changed the CNAME to www.mapeditor.org
Added Google Analytics to the website
Blogger: Added Google+ Badge and updated link to website
Don't link to index.html

This file is served by default, so doesn't need to be part of the URL.
Changed the favicon link to match the blog
Updated and fixed (hopefully) the Google Analytics snippet
The +1 button should not apply to sub-pages
Made 'contact me' an email link

Temporary solution until there is a proper place for contact
information.
Use a better background color of header

Using the average green of the grass tile as background color avoids
some of the flicker perceived while loading the page.
Tried adding a custom 404 page with a redirect
Some tweaks to 404 page

Specify encoding and use document.URL (maybe that works in Firefox?)
Try a more compatible approach for 404 page

Firefox does not support innerText.
Added the MOAI banner in a better size
Added DTD file

Used to be available on the old website and Tiled has an option to
include this reference, so better keep that file there.

It's not currently up to date with the TMX format, though.

Closes bjorn/tiled#416