Improves tests/run.py
Improves tests/run.py

Uses argparse for command-line options (currently only --interactive).

Use 'rpz' and 'rpuz' instead of programs['reprozip'] + ['-v', '-v'...

ViDA-NYU/reprozip,JosuaKrause/reprozip,ViDA-NYU/reprozip,ViDA-NYU/reprozip,ViDA-NYU/reprozip,JosuaKrause/reprozip,ViDA-NYU/reprozip,JosuaKrause/reprozip,JosuaKrause/reprozip