Return if error queue already set
fix up comments in DateTimeExtensions
Using raw http request to check for RavenDB availability, fixes #874
XmlSerializer should include namespaces when dontWrapSingleMessages is set to true.
Merge branch 'patch-1' of https://github.com/SimonCropp/NServiceBus into develop
Merge branch 'patch-2' of https://github.com/SimonCropp/NServiceBus into develop