Add a slighly cheesy contributors panel to readme (#6520)
Add a slighly cheesy contributors panel to readme (#6520)

It's good so many people have contributed!
markelg/xray,pydata/xarray,jhamman/xarray,pydata/xarray,jhamman/xarray,markelg/xray,markelg/xray,pydata/xarray,jhamman/xarray