DOC: document v0.11.2 release
DOC: document v0.11.2 release

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