Revert to dev version
Revert to dev version

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