Use system Python

[hunteke]

The current command line to utilize Temoa is

$ coopr_python temoa.py

Due to Coopr's implementation, this runs an extra (unnecessary) process, and makes it impossible to guarantee a user experience. It would also be more familiar to users to just run Python:

$ python temoa.py

Coopr utilizes virtualenv, and it turns out that we can make this happen. However, some testing is required because we'd need to ensure that all entry points into Temoa setup the environment, and we'd also need to write an "install script" again, so that we can set the path according to the user's environment.