Fix some editorials
Merge pull request #105 from shigeki/shigeki_20130531

Fix some editorials
Add a new PRIORITY frame to allow reprioritization.
Add a little text about reprioritization.
Rather than use type 0x09, use 0x02 which is free (used to be SYN_REPLY)
Rookie error: removed wrong </section> tags. Fix it.
Update Changelog.
IETF rookie error: need to update IANA considerations section.

Added the new PRIORITY frame there too.
update rfc2629.xslt
Merge pull request #111 from willchan/Priority

Priority frame definition
Adding note on reuse of http:/https: default ports.
Fix error handlings on HEADERS and PRIORITY

Error when stream identifier field is 0x0 is not stream error but
connection error
Merge pull request #113 from shigeki/shigeki_20130611

Fix error handling references on HEADERS and PRIORITY
Corrected description of disabling flow control

Flow control can be disabled by WINDOW_UPDATE with END_FLOW_CONTROL.
Corrected description of CANCEL

3.4.1 Stream Creation says that either endpoint can send CNCEL.
Merge pull request #115 from shigeki/shigeki_20130612

Expanded description of disabling flow control
Merge pull request #116 from shigeki/shigeki_20130612_2

CANCEL can come from either endpoint
Remove error code of INVALID_STREAM

It is no longer used after d5a8faeaa605bdff7b96287d72913b4b742104cf
Painting the bike shed a different colour.  Closes #101.
8-byte ping frame as discussed in the interim