better naming for ExpectedStreamVersion
updated comments
wrapup story 1
I now know how to get a stream feed as a SyndicationFeed.
ChatClient can send and fetch.  Can't actually do anything with them yet.
fixed dependencies
staging point - some truly wacky behaviour atm, events are being logged with text from test classes that no-longer-exist-on-disk.  very wtf.
refactored.

previous wtf problem was caused by Chrome's caching behaviour.
Stupid, stupid timestamp mistake rectified
messages are at least being sent and received.  No content, and displayed multiple times, but, progress!
Crude event detail on screen.
Messages are now displayed only once, rather than on each and every poll.
An empty commit, just so I can add this message - story two complete.