Add docstring for unzip method.
Add docstring for unzip method.

michaeljoseph/cookiecutter,dajose/cookiecutter,luzfcb/cookiecutter,hackebrot/cookiecutter,audreyr/cookiecutter,pjbull/cookiecutter,dajose/cookiecutter,michaeljoseph/cookiecutter,audreyr/cookiecutter,hackebrot/cookiecutter,luzfcb/cookiecutter,pjbull/cookiecutter