Fixes #581. Document cleanup conventions
Fixes #581. Document cleanup conventions

jcfr/girder,opadron/girder,Kitware/girder,Kitware/girder,msmolens/girder,chrismattmann/girder,adsorensen/girder,manthey/girder,jbeezley/girder,sutartmelson/girder,chrismattmann/girder,sutartmelson/girder,Xarthisius/girder,manthey/girder,girder/girder,essamjoubori/girder,Xarthisius/girder,kotfic/girder,salamb/girder,sutartmelson/girder,msmolens/girder,jcfr/girder,data-exp-lab/girder,girder/girder,msmolens/girder,opadron/girder,RafaelPalomar/girder,salamb/girder,jbeezley/girder,essamjoubori/girder,adsorensen/girder,kotfic/girder,essamjoubori/girder,jbeezley/girder,salamb/girder,adsorensen/girder,adsorensen/girder,manthey/girder,kotfic/girder,jcfr/girder,kotfic/girder,manthey/girder,kotfic/girder,data-exp-lab/girder,msmolens/girder,data-exp-lab/girder,essamjoubori/girder,adsorensen/girder,RafaelPalomar/girder,salamb/girder,Xarthisius/girder,Xarthisius/girder,msmolens/girder,essamjoubori/girder,RafaelPalomar/girder,sutartmelson/girder,RafaelPalomar/girder,opadron/girder,girder/girder,Xarthisius/girder,Kitware/girder,jcfr/girder,opadron/girder,Kitware/girder,RafaelPalomar/girder,chrismattmann/girder,jbeezley/girder,salamb/girder,chrismattmann/girder,jcfr/girder,opadron/girder,data-exp-lab/girder,chrismattmann/girder,sutartmelson/girder,data-exp-lab/girder,girder/girder