Debugging Robustus "setup.py" failure

Debugging Robustus "setup.py" failure from earlier today.  Despite this failure
Robustus seems to be installed in the virtual enviroment(s).
Install Robustus in the Python virtual environment if its "setup.py" is available

Install Robustus in the Python virtual environment if its "setup.py" is available.
If Robustus has already been installed in the virtual environment, running "setup.py"
should be harmless.  This is required to pass the "test_robustus" test.
PEP8

PEP8.
Merge pull request #76 from braincorp/robustus_setup_py

Robustus setup py