improves documentation on entering virtual environment.
improves documentation on entering virtual environment.

adsorensen/girder,manthey/girder,Xarthisius/girder,manthey/girder,Kitware/girder,jbeezley/girder,manthey/girder,kotfic/girder,adsorensen/girder,Xarthisius/girder,data-exp-lab/girder,data-exp-lab/girder,Xarthisius/girder,data-exp-lab/girder,RafaelPalomar/girder,sutartmelson/girder,girder/girder,manthey/girder,jbeezley/girder,sutartmelson/girder,RafaelPalomar/girder,adsorensen/girder,RafaelPalomar/girder,sutartmelson/girder,girder/girder,RafaelPalomar/girder,data-exp-lab/girder,kotfic/girder,girder/girder,jbeezley/girder,jbeezley/girder,sutartmelson/girder,Kitware/girder,sutartmelson/girder,kotfic/girder,data-exp-lab/girder,kotfic/girder,adsorensen/girder,kotfic/girder,adsorensen/girder,Kitware/girder,Kitware/girder,Xarthisius/girder,Xarthisius/girder,RafaelPalomar/girder,girder/girder