Add new options to `girder-install plugin``
Add new options to `girder-install plugin``

* `--skip-web` will skip the web client build step
* `--skip-reqs` will skip installing requirements.txt files

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