Merge pull request #4 from d0i/topic-ydedit-20130719-revision-update

Topic ydedit 20130719 revision update
fixes to follow official XML
copied back revision tags from xep-0322.xml of gitrious.org/xmpp/xmpp.git (maybe revision number rule is different from our intentions)
replaced <legal> tags with external entity.
fixed broken diagram
Merge branch 'master' into topic-ydedit-20130719-revision-update