Reorganize folders (stream and connection)

network/connection/raw_connection_interface.py

@@ -0,0 +1,15 @@
+from abc import ABC, abstractmethod
+
+class IRawConnection(ABC):
+    """
+    A Raw Connection provides a Reader and a Writer
+    open_connection should return such a connection
+    """
+
+    # @abstractmethod
+    # async def open_connection(self):
+    #     """
+    #     opens a connection on ip and port
+    #     :return: a raw connection
+    #     """
+    #     pass