DOC: Add release notes and brief subarray example for fromiter
DOC: Add release notes and brief subarray example for fromiter

mhvk/numpy,rgommers/numpy,pdebuyl/numpy,jakirkham/numpy,jakirkham/numpy,pdebuyl/numpy,mhvk/numpy,jakirkham/numpy,mhvk/numpy,mhvk/numpy,mattip/numpy,mattip/numpy,charris/numpy,jakirkham/numpy,rgommers/numpy,charris/numpy,endolith/numpy,anntzer/numpy,anntzer/numpy,jakirkham/numpy,endolith/numpy,rgommers/numpy,pdebuyl/numpy,numpy/numpy,numpy/numpy,mhvk/numpy,mattip/numpy,charris/numpy,pdebuyl/numpy,numpy/numpy,endolith/numpy,rgommers/numpy,endolith/numpy,anntzer/numpy,charris/numpy,numpy/numpy,mattip/numpy,anntzer/numpy