XmlRpcStream-0.7 release.

XmlRpcStream is designed for the situation where a persistant connection between client and server is required. XmlRpcStream is not complient with the XML RPC spec as it doesn't use HTTP as the transport protocol.

In this release API has changed, however this is for the better and I now included better documentation done in structured text format. A "connection manager" is now used to look after all sockets in use by the xml rpc streams. This allows many more connections to be used then was previously possible.