ENH: Document packages needed for release.
ENH: Document packages needed for release.

This may be useful for new folks setting up to make a release.
I don't know that specific versions are required for any of
these packages.

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