fetch some corrections and additions

[ulda]

Hi coburnw

I am still using your code and i collected some misc updates and additions from my tree to pull. Highlights:

• fixed SRQ support, now it fully works in my setup an does not block anymore - took me some time to find out what was wrong here
• add a way to do a simple install via old setuptools.
• fix error handling (happening e.g. on connection close) in RPCRequesthandler

feel free to pull this or parts of it.