Merge pull request #7 from hintjens/master

Added first part of RFC 3
Merge pull request #8 from hintjens/master

Added header for RFC 4
Merge pull request #9 from hintjens/master

Fixed titles
Update rfc-2.md

Fixed conditional update that was showing a DELETE.
Merge pull request #10 from dverbeir/patch-1

Update rfc-2.md
Added detail for model