Proposed text for #458
update rfc2629.xslt
Merge pull request #487 from n1hility/master

Correct example to reference the updated table
Re-adding issues.json; the point of this is to keep a backup of the issues list, in case something happens to/with Github.
Updating issues
Adding extensions back
Advice on dealing with large header blocks
Moving to 431
Noting server/client distinction
Adding 6585 reference
Clarifies duplicate allowance in "sets".
Improve explanations about memory limitations
Clarifies differences between literal representations.
Misc editorial improvements
Removing EXTENSION frame
Updating based on interim discussion
Changing IANA policy for frame types
Merge pull request #493 from http2/extend

Adding extensions back.  Closes #95.
make the XML valid
Removing requirements on Content-Encoding