make gridplot, vplot, hplot add the layout as a root
make gridplot, vplot, hplot add the layout as a root

It isn't clear to me this is what these should really do,
we need to sort out how save, push, autoadd, autosave
are supposed to work now.

rs2/bokeh,bokeh/bokeh,ericmjl/bokeh,msarahan/bokeh,rs2/bokeh,aavanian/bokeh,KasperPRasmussen/bokeh,Karel-van-de-Plassche/bokeh,maxalbert/bokeh,philippjfr/bokeh,htygithub/bokeh,Karel-van-de-Plassche/bokeh,mindriot101/bokeh,gpfreitas/bokeh,ericmjl/bokeh,clairetang6/bokeh,gpfreitas/bokeh,philippjfr/bokeh,stonebig/bokeh,percyfal/bokeh,azjps/bokeh,timsnyder/bokeh,azjps/bokeh,philippjfr/bokeh,philippjfr/bokeh,aavanian/bokeh,msarahan/bokeh,aiguofer/bokeh,KasperPRasmussen/bokeh,percyfal/bokeh,aiguofer/bokeh,draperjames/bokeh,DuCorey/bokeh,jakirkham/bokeh,justacec/bokeh,clairetang6/bokeh,phobson/bokeh,dennisobrien/bokeh,timsnyder/bokeh,dennisobrien/bokeh,timsnyder/bokeh,KasperPRasmussen/bokeh,msarahan/bokeh,quasiben/bokeh,justacec/bokeh,jakirkham/bokeh,msarahan/bokeh,schoolie/bokeh,ericmjl/bokeh,stonebig/bokeh,percyfal/bokeh,KasperPRasmussen/bokeh,draperjames/bokeh,htygithub/bokeh,mindriot101/bokeh,stonebig/bokeh,timsnyder/bokeh,mindriot101/bokeh,justacec/bokeh,draperjames/bokeh,schoolie/bokeh,ptitjano/bokeh,jakirkham/bokeh,dennisobrien/bokeh,aiguofer/bokeh,percyfal/bokeh,stonebig/bokeh,clairetang6/bokeh,ptitjano/bokeh,aiguofer/bokeh,bokeh/bokeh,rs2/bokeh,htygithub/bokeh,phobson/bokeh,mindriot101/bokeh,aiguofer/bokeh,DuCorey/bokeh,maxalbert/bokeh,ptitjano/bokeh,ptitjano/bokeh,clairetang6/bokeh,azjps/bokeh,ptitjano/bokeh,Karel-van-de-Plassche/bokeh,ericmjl/bokeh,phobson/bokeh,dennisobrien/bokeh,Karel-van-de-Plassche/bokeh,bokeh/bokeh,gpfreitas/bokeh,phobson/bokeh,dennisobrien/bokeh,aavanian/bokeh,timsnyder/bokeh,justacec/bokeh,maxalbert/bokeh,aavanian/bokeh,bokeh/bokeh,rs2/bokeh,quasiben/bokeh,philippjfr/bokeh,KasperPRasmussen/bokeh,jakirkham/bokeh,percyfal/bokeh,draperjames/bokeh,gpfreitas/bokeh,jakirkham/bokeh,DuCorey/bokeh,Karel-van-de-Plassche/bokeh,phobson/bokeh,DuCorey/bokeh,rs2/bokeh,quasiben/bokeh,azjps/bokeh,ericmjl/bokeh,draperjames/bokeh,schoolie/bokeh,bokeh/bokeh,schoolie/bokeh,htygithub/bokeh,maxalbert/bokeh,schoolie/bokeh,DuCorey/bokeh,azjps/bokeh,aavanian/bokeh