Add forgotten files.
Rename the directory for a plugin.
Edit the plugin files to match our usual standards:

Reindent and minor edits. Properly declare that the viscosity depends on the temperature.

Merge the .h and .cc files for this plugin.
Go through the new section and edit and revise it. Make the input files in the doc/ directory only those pieces that really matter.
Finish editing the manual:

Slight edits in explaining the process of loading benchmark shared libs.

Minor edits.

Reference a particular section.

Document some of the results.
Add an entry.