Updates from Joe Insley from Argonne for the plugin.

These changes are tracked in the repo at:
https://svn.ci.uchicago.edu/svn/pv_nektar/tags/version_2.0.0
This should be nearly the same as that except for a small
bunch of changes.

Change-Id: Ie681bca2a43a46863f45e1ec8339d66f0df763a1
Merge topic '13060_update_netkarreaderplugin' into next

44eda2e Updates from Joe Insley from Argonne for the plugin.
Remove assumption on ghost level per block

Change-Id: Ie7d6e57dcf362ac86c7c71402b1cc56619aac46f
Merge topic '14009_MaterialInterfaceFilter_improvement' into next

11aa3b7 Remove assumption on ghost level per block