Add shebangs to every script designed to be run from the command line

[clbarnes]

Adding #!/usr/bin/env python as the first line of any text file tells linux that it is a python script, so you only have to sudo script_name.py instead of sudo python script_name.py.

[clbarnes]

Assigned to people who are actually working on main scripts.

[zqwei]

added to lasertag.py