Updated scripts/devSetup python scripts to natively support python2.7 or python3

I've tested it on archlinux with python3.3 installed.

Running ``sudo python ./coco/setup/devSetup/setup.py`` works perfectly (as far as I know).
Running ``sudo python2 ./coco/setup/devSetup/setup.py`` works just the same, but the console cursor moves erratically during download  sections (visual bug).

Please test it on your own machines to see if there is something I missed.

I don't know how this will behave if you use <python2.7

If I have done anything wrong meta-wise please point it out as this is my first contribution on GitHub.