ENH: Make use of ExitStack in npyio.py
ENH: Make use of ExitStack in npyio.py

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