Implemented general Element constructor conversions
Implemented general Element constructor conversions

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