refactored MsgSink and MsgSource

receiver/nmea_receiver.py

@@ -1,8 +1,8 @@
 from msg_container import MsgContainer
-from msg_sink import MsgSink
+from msg_listener import MsgListener
 import re
 
-class AsciiReceiver(MsgSink):
+class AsciiReceiver(MsgListener):
 	def __init__(self, name: str, filter: str):
 		super().__init__()
 		self.name = name