DOC: Add graph showing different behaviors of np.percentile
DOC: Add graph showing different behaviors of np.percentile

With thanks to @ricardoV94 for inspiring this

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