pin ggplot version preceding uploading new versions to anaconda.org (#4566)
pin ggplot version preceding uploading new versions to anaconda.org (#4566)

* pin ggplot version preceding uploading new versions to anaconda.org

* add bokeh channel at start

* Update travis_install

aiguofer/bokeh,draperjames/bokeh,aiguofer/bokeh,DuCorey/bokeh,stonebig/bokeh,bokeh/bokeh,rs2/bokeh,DuCorey/bokeh,bokeh/bokeh,ptitjano/bokeh,stonebig/bokeh,schoolie/bokeh,phobson/bokeh,DuCorey/bokeh,percyfal/bokeh,schoolie/bokeh,dennisobrien/bokeh,philippjfr/bokeh,timsnyder/bokeh,DuCorey/bokeh,philippjfr/bokeh,draperjames/bokeh,dennisobrien/bokeh,percyfal/bokeh,bokeh/bokeh,ericmjl/bokeh,phobson/bokeh,Karel-van-de-Plassche/bokeh,dennisobrien/bokeh,mindriot101/bokeh,rs2/bokeh,phobson/bokeh,aavanian/bokeh,azjps/bokeh,phobson/bokeh,ericmjl/bokeh,mindriot101/bokeh,ericmjl/bokeh,aavanian/bokeh,ptitjano/bokeh,jakirkham/bokeh,jakirkham/bokeh,stonebig/bokeh,timsnyder/bokeh,DuCorey/bokeh,rs2/bokeh,ptitjano/bokeh,Karel-van-de-Plassche/bokeh,jakirkham/bokeh,bokeh/bokeh,ptitjano/bokeh,aavanian/bokeh,mindriot101/bokeh,philippjfr/bokeh,stonebig/bokeh,jakirkham/bokeh,Karel-van-de-Plassche/bokeh,aavanian/bokeh,rs2/bokeh,aiguofer/bokeh,draperjames/bokeh,aiguofer/bokeh,dennisobrien/bokeh,rs2/bokeh,percyfal/bokeh,timsnyder/bokeh,ptitjano/bokeh,draperjames/bokeh,timsnyder/bokeh,philippjfr/bokeh,schoolie/bokeh,ericmjl/bokeh,jakirkham/bokeh,azjps/bokeh,mindriot101/bokeh,azjps/bokeh,timsnyder/bokeh,philippjfr/bokeh,percyfal/bokeh,Karel-van-de-Plassche/bokeh,schoolie/bokeh,ericmjl/bokeh,draperjames/bokeh,azjps/bokeh,dennisobrien/bokeh,azjps/bokeh,bokeh/bokeh,phobson/bokeh,aavanian/bokeh,percyfal/bokeh,aiguofer/bokeh,Karel-van-de-Plassche/bokeh,schoolie/bokeh