First use of Bokeh backend now issues a warning to the user
First use of Bokeh backend now issues a warning to the user

mjabri/holoviews,vascotenner/holoviews,mjabri/holoviews,basnijholt/holoviews,basnijholt/holoviews,basnijholt/holoviews,ioam/holoviews,ioam/holoviews,ioam/holoviews,vascotenner/holoviews,vascotenner/holoviews,mjabri/holoviews