Update the array API namespace __init__.py docstring with todos
Update the array API namespace __init__.py docstring with todos

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