dask.bag: add unpack_kwargs
dask.bag: add unpack_kwargs

dask/dask,jakirkham/dask,cpcloud/dask,jcrist/dask,chrisbarber/dask,mrocklin/dask,cowlicks/dask,mikegraham/dask,blaze/dask,jcrist/dask,blaze/dask,mrocklin/dask,gameduell/dask,ContinuumIO/dask,mraspaud/dask,ContinuumIO/dask,dask/dask,mraspaud/dask,jakirkham/dask