Stop overriding level of headings

No longer set aria-level on section headers.
Fixes #308
Removed check for aria-level
Removed aria-level checks.
Removed aria-level check.
Merge branch 'develop' into gh-pages
Add a pointer to respec-docs

Added a section with a pointer to respec-docs.
Merge branch 'develop' into gh-pages
v3.2.20
Merge branch 'develop' into gh-pages
support for sequence<Promise<T>> ; close #331
Added handling for encoding subjectPrefix

This is a fix for issue #340
Merge pull request #342 from w3c/patch-340

Added handling for encoding subjectPrefix to prevent malformed mailto URI in SoTD.
Added a pointer to the w3.org respec docs

With a secondary pointer to the GH repository.
Added a line wrap

So it is more readable in raw MD format.
Merge pull request #337 from halindrome/patch-7

Add a pointer to respec-docs
Merge pull request #325 from halindrome/patch-5

Stop setting aria-level on headings
Merge pull request #339 from dontcallmedom/promise

support for sequence<Promise<T>> ; close #331
Added mailto handling for CG when it is a draft

Copied over the mailing list access / subscription
instructions from the rec-track sotd template to the
cgbg sotd template.  Should fix #34
Moved mailto links to the end of the SoTD

As per comments from @marcoscaceres and @aldafu
Merge pull request #343 from w3c/patch-34

Added mailto handling for CG when wgPublicList is defined.