Improve CUDA docs
Improve CUDA docs

gdementen/numba,stuartarchibald/numba,jriehl/numba,gmarkall/numba,sklam/numba,jriehl/numba,stonebig/numba,stefanseefeld/numba,numba/numba,stuartarchibald/numba,stuartarchibald/numba,stonebig/numba,numba/numba,gmarkall/numba,cpcloud/numba,cpcloud/numba,sklam/numba,IntelLabs/numba,GaZ3ll3/numba,numba/numba,IntelLabs/numba,seibert/numba,jriehl/numba,IntelLabs/numba,gmarkall/numba,pitrou/numba,pombredanne/numba,stefanseefeld/numba,sklam/numba,ssarangi/numba,stonebig/numba,stuartarchibald/numba,pitrou/numba,gmarkall/numba,seibert/numba,stefanseefeld/numba,pombredanne/numba,seibert/numba,gdementen/numba,jriehl/numba,sklam/numba,stonebig/numba,jriehl/numba,stonebig/numba,ssarangi/numba,pombredanne/numba,numba/numba,gdementen/numba,gmarkall/numba,GaZ3ll3/numba,sklam/numba,GaZ3ll3/numba,pitrou/numba,IntelLabs/numba,pitrou/numba,ssarangi/numba,pitrou/numba,stefanseefeld/numba,pombredanne/numba,seibert/numba,ssarangi/numba,gdementen/numba,gdementen/numba,ssarangi/numba,stuartarchibald/numba,cpcloud/numba,seibert/numba,cpcloud/numba,stefanseefeld/numba,GaZ3ll3/numba,cpcloud/numba,IntelLabs/numba,numba/numba,GaZ3ll3/numba,pombredanne/numba