Fixed pygrapes.adapter.Zmq.detach_listener method
Fixed pygrapes.adapter.Zmq._configuration
Return instance of 'Zmq' (self) in Zmq.connect
Return deferred instance from Zmq.send
Return instance of 'Zmq' (self) in Zmq.connect when socket has been initialized already
Added more tests for pygrapes.adapter.Zmq
Refactored pygrapes.adapter.Abstract so default behaviour for handling listeners (throught attach_listener and detach_listener) is set
Refactored pygrapes.adapter.Local to use default listeners handling behaviour inherited from pygrapes.adapter.Abstract
Refactored pygrapes.adapter.Zmq to use default listeners handling behaviour inherited from pygrapes.adapter.Abstract (also refactored tests)