Made import in plotting.mpl Python 3 compatible
Made import in plotting.mpl Python 3 compatible

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