Removed outdated comments.  Improved description of dependencies.  Added links.
Removed outdated comments.  Improved description of dependencies.  Added links.

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