update README file
update README file

cc @Carreau

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