Fix a broken internal reference.

Referencing step 10, substep 12 isn't accurate any longer.
This creates a less fragile reference.
Was probably broken since ea580809ffe50bec627317bd0216f952b18d4552 .
Add self as editor.
Merge pull request #4 from silviapfeiffer/CSS-ref

Fix a broken internal reference.

The use of "initial containing block" appears to be incorrect, bug filed:
https://www.w3.org/Bugs/Public/show_bug.cgi?id=24326
Merge pull request #5 from foolip/add-editor

Add Philip as editor.
Remove tabs and trailing whitespace.
Fix almost all HTML validation errors.

validator.nu also complains about the custom meta keywords bug.*,
but those are presumably used by bug-assist.js.
Update link to spec

With the move to github, we will not maintain the spec in Mercurial any
longer.
Merge pull request #7 from silviapfeiffer/updateDraftURL

Update link to spec
Merge pull request #6 from foolip/whitespace-matters

Remove tabs and trailing whitespace.
Merge pull request #8 from foolip/almost-valid

Fix almost all HTML validation errors.
Remove self from list of contributors

It looks a bit strange to thank oneself...
Merge pull request #9 from foolip/no-thanks

Remove self from list of contributors