Merge pull request #14 from FoamyGuy/master

Allowing touchio pins to work without needing import

Author: ladyada

adafruit_debouncer.py

@@ -46,7 +46,6 @@
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_Debouncer.git"
 
 import time
-import digitalio
 from micropython import const
 
 _DEBOUNCED_STATE = const(0x01)
@@ -62,7 +61,7 @@ def __init__(self, io_or_predicate, interval=0.010):
            :param int interval: bounce threshold in seconds (default is 0.010, i.e. 10 milliseconds)
         """
         self.state = 0x00
-        if isinstance(io_or_predicate, digitalio.DigitalInOut):
+        if hasattr(io_or_predicate, 'value'):
             self.function = lambda: io_or_predicate.value
         else:
             self.function = io_or_predicate