DOC: Describe memory considerations in in1d/isin
DOC: Describe memory considerations in in1d/isin

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