DOC: Add alias docstrings for sample and ranf
DOC: Add alias docstrings for sample and ranf

Add docstring and add to __all__

ahaldane/numpy,jorisvandenbossche/numpy,jorisvandenbossche/numpy,pdebuyl/numpy,ahaldane/numpy,madphysicist/numpy,madphysicist/numpy,jakirkham/numpy,rgommers/numpy,pizzathief/numpy,anntzer/numpy,endolith/numpy,grlee77/numpy,charris/numpy,charris/numpy,numpy/numpy,mhvk/numpy,simongibbons/numpy,mhvk/numpy,pdebuyl/numpy,seberg/numpy,jorisvandenbossche/numpy,MSeifert04/numpy,MSeifert04/numpy,endolith/numpy,grlee77/numpy,jakirkham/numpy,jakirkham/numpy,jakirkham/numpy,WarrenWeckesser/numpy,charris/numpy,simongibbons/numpy,pbrod/numpy,MSeifert04/numpy,MSeifert04/numpy,madphysicist/numpy,mattip/numpy,grlee77/numpy,pdebuyl/numpy,abalkin/numpy,pizzathief/numpy,endolith/numpy,endolith/numpy,anntzer/numpy,charris/numpy,jakirkham/numpy,mattip/numpy,WarrenWeckesser/numpy,pbrod/numpy,madphysicist/numpy,numpy/numpy,rgommers/numpy,rgommers/numpy,WarrenWeckesser/numpy,anntzer/numpy,anntzer/numpy,simongibbons/numpy,pizzathief/numpy,madphysicist/numpy,WarrenWeckesser/numpy,pizzathief/numpy,ahaldane/numpy,pbrod/numpy,mattip/numpy,jorisvandenbossche/numpy,mhvk/numpy,numpy/numpy,jorisvandenbossche/numpy,abalkin/numpy,ahaldane/numpy,grlee77/numpy,MSeifert04/numpy,abalkin/numpy,numpy/numpy,pbrod/numpy,seberg/numpy,grlee77/numpy,simongibbons/numpy,seberg/numpy,seberg/numpy,rgommers/numpy,pbrod/numpy,simongibbons/numpy,pizzathief/numpy,ahaldane/numpy,mattip/numpy,WarrenWeckesser/numpy,mhvk/numpy,pdebuyl/numpy,mhvk/numpy