Finished a merge that had conflicts.
Updates to read and report property values.
Work to get group names
continue effort to extract group names
Fix infinite loop when negative tracks occur

* uncommented return statement when negative tracks occur
* negative tracks are no longer multiplied by -1 and added to tally
* added a counter to report how many negative tracks occurred
Incorporate g1wr and normlwr into fluka_funcs.cpp
incorporate g1wr and nrmlwr into fluka_funcs; also add some cmake capability
Remove obsolete files and commented-out code; create separate main file for readvol; fix cmake to create readvol and mainfludag targets.
Add mainfludag build to cmake system; set testing directory to sample files
Ignore cmake-generated Makefile
remove run-specific test directory
Add directory with sample run files
Update build documentation for cmake system
Remove README that had changed to README.rst
FluDAG User Features
Allow cmake with -D defines for pathname variables
Changing text of landing page for DAGMC website.
Add link to CNERG
Small formatting tweaks
--dry-run