Some useful things to install on your RaspberryPi:
sudo apt-get install i2c-tools
sudo apt-get install python-smbus
sudo adduser i2c
i2cdetect -y 0
May use in future:
sudo apt-get install python-rpi.gpio
Run indivdual tests:
python -m unittest pca9685pw_testpy.TestPCM.test_setColourCyan