Some updates:
- Added a check for empty trait tables: this was specifically an issue if users created custom trait tables and these were empty/summed to zero for one of the domains
- PFAM names were updated: in the PICRUSt2-SC database these used the names given by Eggnog as annotations. These have now been mapped to PFAM ID's (where possible) so that they match the description map files. The add_descriptions script can now be used with the PFAM ID's again. Note that there were a few PFAM names from the Eggnog annotations that didn't have PFAM ID's; these have been left as they are but they have no additional descriptions. 
- Script naming for the scripts that work with only a single domain, rather than the PICRUSt2-SC separate reference files for bacteria and archaea, has been updated. This reflects that these scripts aren't only for use with the oldIMG database, but can be for fungi, either/or of the bacteria/archaea files, another custom database, etc.