Merge pull request #22 from infamy/patch-1

Update adafruit_ble_radio.py

Author: FoamyGuy

adafruit_ble_radio.py

@@ -149,6 +149,8 @@ def receive(self, timeout=1):
         Returns a message received on the channel on which the radio is
         listening.
 
+        :param float timeout: The length of time (in seconds) the radio listens for a broadcast
+
         :return: A string representation of the received message, or else None.
         """
         msg = self.receive_full(timeout=timeout)