ssn ready for review

To the best of my knowledge ssn is now stable and awaits your review prior to the vote to publish a fresh working draft  at the F2F.  In the last few days there
Has been work on tidying up issue-105 and the changes section (myself) , extending the section on modularity and sosa by Krzysztof, and the automated description of sosa together with relevant issue documentation by Armin.

Please have a look!
-Kerry