Moved event hub to core assembly as it is obviously not the interop service but rather a core library event backbone.

Magnum is only dependant from pjsip4net.Core, which is good
Got rid of nasty Castle container commision concern running BeginInit when nobody asked it to.

As a price to pay - I had to remove BCL standard interface ISupportInitialize from Initializable.
Added service type forwarding feature to common container interface.
Renaming invite session to signalling session.

Clean up.
Merge branch 'master' of github.com:siniypin/pjsip4net