MAINT: Update development branch version to 1.15.0.
MAINT: Update development branch version to 1.15.0.

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