raise informative error on map_blocks arg switch
raise informative error on map_blocks arg switch

vikhyat/dask,hainm/dask,blaze/dask,freeman-lab/dask,PhE/dask,cowlicks/dask,mrocklin/dask,jcrist/dask,ssanderson/dask,clarkfitzg/dask,simudream/dask,mrocklin/dask,ContinuumIO/dask,clarkfitzg/dask,vikhyat/dask,dask/dask,chrisbarber/dask,ContinuumIO/dask,blaze/dask,jakirkham/dask,wiso/dask,marianotepper/dask,mraspaud/dask,freeman-lab/dask,jakirkham/dask,jcrist/dask,jayhetee/dask,pombredanne/dask,ssanderson/dask,dask/dask,jayhetee/dask,gameduell/dask,mikegraham/dask,PhE/dask,wiso/dask,pombredanne/dask,cpcloud/dask,hainm/dask,marianotepper/dask,mraspaud/dask,simudream/dask