BLD: use Python 3.6 instead of 2.7 as default for doc build.
BLD: use Python 3.6 instead of 2.7 as default for doc build.

grlee77/numpy,pizzathief/numpy,anntzer/numpy,abalkin/numpy,mhvk/numpy,Eric89GXL/numpy,shoyer/numpy,pizzathief/numpy,jakirkham/numpy,charris/numpy,WarrenWeckesser/numpy,madphysicist/numpy,mattip/numpy,Eric89GXL/numpy,abalkin/numpy,numpy/numpy,numpy/numpy,pbrod/numpy,grlee77/numpy,anntzer/numpy,simongibbons/numpy,simongibbons/numpy,WarrenWeckesser/numpy,MSeifert04/numpy,shoyer/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,pdebuyl/numpy,madphysicist/numpy,pbrod/numpy,endolith/numpy,simongibbons/numpy,simongibbons/numpy,endolith/numpy,pdebuyl/numpy,mhvk/numpy,grlee77/numpy,seberg/numpy,mhvk/numpy,numpy/numpy,mhvk/numpy,WarrenWeckesser/numpy,ahaldane/numpy,mattip/numpy,endolith/numpy,charris/numpy,rgommers/numpy,pdebuyl/numpy,pdebuyl/numpy,charris/numpy,shoyer/numpy,rgommers/numpy,gfyoung/numpy,rgommers/numpy,gfyoung/numpy,ahaldane/numpy,charris/numpy,mhvk/numpy,pizzathief/numpy,tynn/numpy,pbrod/numpy,jorisvandenbossche/numpy,jakirkham/numpy,ahaldane/numpy,Eric89GXL/numpy,pizzathief/numpy,anntzer/numpy,numpy/numpy,jorisvandenbossche/numpy,madphysicist/numpy,shoyer/numpy,jorisvandenbossche/numpy,madphysicist/numpy,WarrenWeckesser/numpy,pizzathief/numpy,shoyer/numpy,WarrenWeckesser/numpy,abalkin/numpy,mattip/numpy,grlee77/numpy,anntzer/numpy,endolith/numpy,rgommers/numpy,seberg/numpy,tynn/numpy,simongibbons/numpy,gfyoung/numpy,MSeifert04/numpy,jakirkham/numpy,MSeifert04/numpy,seberg/numpy,ahaldane/numpy,ahaldane/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,mattip/numpy,Eric89GXL/numpy,tynn/numpy,seberg/numpy,pbrod/numpy,grlee77/numpy,jakirkham/numpy,madphysicist/numpy,jakirkham/numpy,pbrod/numpy