Rename "Recipes" to "Gallery" (#2303)
Rename "Recipes" to "Gallery" (#2303)

* Rename "Recipes" to "Gallery"

* Don't use "gallery" as internal link name

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