Simplify stream priority.
reinstitute per-DATA compression
Editorial fix
More editorial fix
Merge pull request #461 from summerwind/editorial-fix

Editorial fix
fix broken xrefs
move error text from setting to flag
Cleaning up whitespace and indentation.
Adding first pass for BLOCKED frame.
Adding warning regarding BLOCKED
Cleaning up ALTSVC frame description.
Updating GOAWAY to allow for multiple sending, editorial cleanup of same.
Adding more BLOCKED references.
Editorial tweak to last
Adding implementation note.
Adding tree+weight prioritization change.
Adding change log entry.
Merge branch '445-gzip' of git://github.com/phluid61/http2-spec into gzip-te

Conflicts:
	draft-ietf-httpbis-http2.xml

Added security considerations.
Added note about Content-Length.
Fixing bad 1952 cross reference.
Priority edits.  Closes #464.