Fix getPiRevision to check for revision value 0002 or 0003 as rev 1 boards.

Author: tdicola

Adafruit_I2C/Adafruit_I2C.py

@@ -13,11 +13,12 @@ def getPiRevision():
     "Gets the version number of the Raspberry Pi board"
     # Courtesy quick2wire-python-api
     # https://github.com/quick2wire/quick2wire-python-api
+    # Updated revision info from: http://elinux.org/RPi_HardwareHistory#Board_Revision_History
     try:
       with open('/proc/cpuinfo','r') as f:
         for line in f:
           if line.startswith('Revision'):
-            return 1 if line.rstrip()[-1] in ['1','2'] else 2
+            return 1 if line.rstrip()[-1] in ['2','3'] else 2
     except:
       return 0