Updating HTML file comment with instructions on spans and extra divs
Only allow `[a-zA-Z0-9$_]` in JSON-P callback names

Ref. #31 and https://github.com/mezzoblue/csszengarden.com/pull/24/files#r4150859.
Fix include of masterlist.php in all tr/*/index.php
Merge pull request #31 from mathiasbynens/safer-jsonp

Only allow `[a-zA-Z0-9$_]` in JSON-P callback names
Merge pull request #32 from NumEricR/fix-tr-masterlist

Fix include of masterlist.php in all tr/*/index.php
Zen Garden Submission. Plus, addition of viewport meta tag. Um, relying on the spans...
Despanning 213, 212, 211. 213 had pos:absolute elements, needed different fix from Kellum: goo.gl/GXxdI#comment-61863. 212 had no spans. Hope this helps!
Merge branch 'remove-spans' of https://github.com/eyesofjeremy/csszengarden.com into remove-spans