Simplified figure fallback and added Python 3 animation warning
Simplified figure fallback and added Python 3 animation warning

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