Revert to dev version
Revert to dev version

shoyer/xray,pydata/xarray,rabernat/xray,rabernat/xray,xray/xray,markelg/xray,jhamman/xray,jhamman/xarray,chunweiyuan/xarray,shoyer/xarray,shoyer/xarray,markelg/xray,markelg/xray,jhamman/xarray,pydata/xarray,pydata/xarray,jcmgray/xarray,jhamman/xarray