Made changes to be python3 compatible. We should probably switch to python3
for this project see: https://wiki.python.org/moin/Python2orPython3
More python3 fixes.
Merge branch 'python3'

Conflicts:
	src/adafruit/Adafruit_I2C.py
	src/adafruit/Adafruit_MCP230xx.py
	src/scorpion/hal/puck.py
	src/scorpion/localdb/xmlparser.py