include reference to cross2d in documentation
include reference to cross2d in documentation

seibert/numba,gmarkall/numba,stonebig/numba,stonebig/numba,IntelLabs/numba,seibert/numba,cpcloud/numba,stonebig/numba,stonebig/numba,numba/numba,cpcloud/numba,numba/numba,numba/numba,numba/numba,IntelLabs/numba,IntelLabs/numba,cpcloud/numba,seibert/numba,stuartarchibald/numba,IntelLabs/numba,stuartarchibald/numba,sklam/numba,seibert/numba,cpcloud/numba,stuartarchibald/numba,stuartarchibald/numba,gmarkall/numba,stuartarchibald/numba,sklam/numba,gmarkall/numba,cpcloud/numba,stonebig/numba,seibert/numba,sklam/numba,sklam/numba,gmarkall/numba,IntelLabs/numba,sklam/numba,gmarkall/numba,numba/numba