Python setup simplification

[petebachant]

Rather than adding the caelus.py script to the system path, would it make sense to have users install Caelus as a python package itself? This would allow different versions to be installed in different virtualenv or conda envs. It could also open up new scripting possibilities since users would be able to directly import, e.g., caelus.run.Runner in their case scripts, rather than using subprocess.

[Shreyas A]

+1

This was going to be my feedback too. This will greatly simplify the build process as well as the python-based run process.

[Chris Sideroff]

CPL provides this functionality (http://caelus.readthedocs.io)