quiet dependency installs (#4960)
quiet dependency installs (#4960)

* quiet dependency install

* Remove redundant quiet flag on Appveyor

ContinuumIO/dask,dask/dask,mrocklin/dask,blaze/dask,jakirkham/dask,mrocklin/dask,ContinuumIO/dask,blaze/dask,jakirkham/dask,dask/dask