moved i2c.py into common folder
moved i2c.py into common folder

leftbrainstrain/PyBBIO,ims-tyler/PyBBIO,ims-tyler/PyBBIO,leftbrainstrain/PyBBIO,graycatlabs/PyBBIO,graycatlabs/PyBBIO,leftbrainstrain/PyBBIO,graycatlabs/PyBBIO,graycatlabs/PyBBIO,leftbrainstrain/PyBBIO,ims-tyler/PyBBIO,leftbrainstrain/PyBBIO,graycatlabs/PyBBIO,ims-tyler/PyBBIO,ims-tyler/PyBBIO