BLD: install mingw32 v7.3.0 for win32
BLD: install mingw32 v7.3.0 for win32

rgommers/numpy,seberg/numpy,mhvk/numpy,grlee77/numpy,simongibbons/numpy,charris/numpy,pdebuyl/numpy,madphysicist/numpy,madphysicist/numpy,seberg/numpy,abalkin/numpy,endolith/numpy,simongibbons/numpy,pbrod/numpy,pbrod/numpy,simongibbons/numpy,charris/numpy,endolith/numpy,simongibbons/numpy,jakirkham/numpy,madphysicist/numpy,endolith/numpy,mhvk/numpy,endolith/numpy,jakirkham/numpy,pbrod/numpy,mhvk/numpy,mhvk/numpy,charris/numpy,anntzer/numpy,numpy/numpy,simongibbons/numpy,rgommers/numpy,rgommers/numpy,mattip/numpy,mattip/numpy,pbrod/numpy,grlee77/numpy,pdebuyl/numpy,grlee77/numpy,mattip/numpy,jakirkham/numpy,pbrod/numpy,numpy/numpy,grlee77/numpy,jakirkham/numpy,mattip/numpy,numpy/numpy,anntzer/numpy,madphysicist/numpy,abalkin/numpy,numpy/numpy,madphysicist/numpy,rgommers/numpy,grlee77/numpy,anntzer/numpy,charris/numpy,abalkin/numpy,seberg/numpy,mhvk/numpy,anntzer/numpy,pdebuyl/numpy,jakirkham/numpy,seberg/numpy,pdebuyl/numpy