Only install pdiff under py27 where it is used.
Only install pdiff under py27 where it is used.

azjps/bokeh,percyfal/bokeh,ericmjl/bokeh,msarahan/bokeh,azjps/bokeh,DuCorey/bokeh,mindriot101/bokeh,aiguofer/bokeh,jplourenco/bokeh,ptitjano/bokeh,ChinaQuants/bokeh,KasperPRasmussen/bokeh,jakirkham/bokeh,Karel-van-de-Plassche/bokeh,ChinaQuants/bokeh,mindriot101/bokeh,azjps/bokeh,rs2/bokeh,deeplook/bokeh,khkaminska/bokeh,ChinaQuants/bokeh,jakirkham/bokeh,clairetang6/bokeh,justacec/bokeh,DuCorey/bokeh,justacec/bokeh,Karel-van-de-Plassche/bokeh,bokeh/bokeh,maxalbert/bokeh,percyfal/bokeh,azjps/bokeh,schoolie/bokeh,aiguofer/bokeh,philippjfr/bokeh,rs2/bokeh,philippjfr/bokeh,quasiben/bokeh,jplourenco/bokeh,percyfal/bokeh,aiguofer/bokeh,bokeh/bokeh,dennisobrien/bokeh,philippjfr/bokeh,maxalbert/bokeh,khkaminska/bokeh,schoolie/bokeh,phobson/bokeh,DuCorey/bokeh,aavanian/bokeh,rs2/bokeh,ChinaQuants/bokeh,dennisobrien/bokeh,msarahan/bokeh,draperjames/bokeh,aavanian/bokeh,ericmjl/bokeh,maxalbert/bokeh,jplourenco/bokeh,bokeh/bokeh,jplourenco/bokeh,stonebig/bokeh,KasperPRasmussen/bokeh,DuCorey/bokeh,percyfal/bokeh,htygithub/bokeh,aavanian/bokeh,evidation-health/bokeh,deeplook/bokeh,clairetang6/bokeh,aavanian/bokeh,aiguofer/bokeh,azjps/bokeh,timsnyder/bokeh,gpfreitas/bokeh,ptitjano/bokeh,khkaminska/bokeh,draperjames/bokeh,timsnyder/bokeh,msarahan/bokeh,rs2/bokeh,justacec/bokeh,aavanian/bokeh,srinathv/bokeh,KasperPRasmussen/bokeh,msarahan/bokeh,htygithub/bokeh,jakirkham/bokeh,KasperPRasmussen/bokeh,DuCorey/bokeh,KasperPRasmussen/bokeh,stonebig/bokeh,aiguofer/bokeh,mindriot101/bokeh,Karel-van-de-Plassche/bokeh,percyfal/bokeh,quasiben/bokeh,phobson/bokeh,gpfreitas/bokeh,ericmjl/bokeh,khkaminska/bokeh,evidation-health/bokeh,evidation-health/bokeh,phobson/bokeh,draperjames/bokeh,jakirkham/bokeh,Karel-van-de-Plassche/bokeh,srinathv/bokeh,ericmjl/bokeh,philippjfr/bokeh,schoolie/bokeh,evidation-health/bokeh,ericmjl/bokeh,quasiben/bokeh,htygithub/bokeh,bokeh/bokeh,ptitjano/bokeh,timsnyder/bokeh,draperjames/bokeh,dennisobrien/bokeh,timsnyder/bokeh,gpfreitas/bokeh,maxalbert/bokeh,gpfreitas/bokeh,dennisobrien/bokeh,schoolie/bokeh,ptitjano/bokeh,htygithub/bokeh,deeplook/bokeh,rs2/bokeh,jakirkham/bokeh,mindriot101/bokeh,ptitjano/bokeh,schoolie/bokeh,timsnyder/bokeh,Karel-van-de-Plassche/bokeh,justacec/bokeh,srinathv/bokeh,phobson/bokeh,srinathv/bokeh,bokeh/bokeh,dennisobrien/bokeh,clairetang6/bokeh,clairetang6/bokeh,philippjfr/bokeh,draperjames/bokeh,stonebig/bokeh,phobson/bokeh,deeplook/bokeh,stonebig/bokeh