Script to push to NuGet.
Remove name from assembly info; this looks silly on NuGet.
Update xUnit to v2.

App.config doesn't seem to work with 1.9, and we want a TraceListener to
log service communications for debugging.
Write service communication to a log file for easier debugging.

Normal console output is only visible if the tests finish; so this'll
make it easier to track down tests that are "hanging" because the
expected event didn't come back from the service.
Handle errors when deserialising events.

If the underlying JSON changes the createNotification() callback will
fail. This will pass the exception back to the Observer (if they care
enough to subscribe to it).