comment-129

- Add text as suggested.
- Add ref to 11.2.
fix up some of the definitions
fix up some of the MUST / must - SHOULD / should confusion in the non normative seciton of the spec
Merge pull request #132 from petithug/comment-129

comment-129
fixed stuff found in diff review
Merge branch 'master' of github.com:fluffy/p2psip-base-master