Api cleanup
Added hack for Raven "Raven-Client-Version" header.
Removed Raven indexes until we figure out what is going on with ilmerging.
Merge branch 'develop' of git://github.com/NServiceBus/NServiceBus into develop
Use Unicast.Transport.Transactional.Config.Bootstrapper.TransactionSettings.IsTransactional instead of Endpoint.IsVolatile for none transactional bus configurations.

Closes #918