reimplement copy
reimplement copy

Now that getitem with slice is available, use that instead of making
a new list manually and iterting over it.

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