update setup method with setup.sh
	modified:   README.md
	new file:   pyvenv-3.3.py
	new file:   setup.sh
Merge branch 'master' of github.com:HomeBrewExercisesOnPython/DiveIntoPython3

Conflicts:
	README.md
various bug fixes and document update
	modified:   README.md
	modified:   freeze.txt
	modified:   pyvenv-3.3.py
	modified:   setup.sh
modified:   exercises/chap2/q0002.py
    sample solution for q0002.py