Sanitize Connection class.
Sanitize Connection class.

Move field and property at the same place, wrap field in properties, remove dead code.

Tragetaschen/dbus-sharp,mono/dbus-sharp,mono/dbus-sharp,arfbtwn/dbus-sharp,Tragetaschen/dbus-sharp,openmedicus/dbus-sharp,arfbtwn/dbus-sharp,openmedicus/dbus-sharp