DOC: Fix link to numpy docs in README.
DOC: Fix link to numpy docs in README.

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