modified version to freeze for renderer (flow-project#286)

Addressing issue 145 (flow-project#160)

* Addressing issue 145

* Fixed setup script env_params to reflect new changes

* Fixed pep8 issues

* Added new green_wave_env requirements to rllib/green_wave.py

* Added new env params to the benchmark experiments as well

* Added env params to baseline as well. nose2 not passing for some figure_eight scenarios

using environemnt.yml instead of requirements.txt