Initial editorial work.
move settings persistence example up
Make SETTINGS persistence its own subsection
Move general SETTINGS advice up to the top of its section.
Make Defined Settings its own section
more editorial work
Promote Header Blocks out of Frame Types
more editorial work
fix mis-capitalised HEADERS
Go back to "clients and servers" becaue it's not a recipient until it's handling messages...
Merge pull request #64 from mnot/edits

Editorial changes from @mnot.