updating the Universal HMM set thanks to notes from @molly-kholodova

    - PF00181 ("Ribosomal_L2") was changed to PF03947 ("Ribosomal_L2_C")
        - the C-terminal (which PF03947 covers) is better conserved
    - PF00827 ("Ribosomal_L15") was changed to PF00828 ("Ribosomal_L27A")
        - PF00827 was archaea/euk only, PF00828 holds the bac/arc L15 also
    - PF17135 ("Ribosomal_L18") was changed to PF00861 ("Ribosomal_L18p")
        - the PF00861 model is better distributed

Author: AstrobioMike

bin/GToTree

@@ -980,7 +980,7 @@ fi
 printf "${YELLOW}\n    HMM source to be used:\n${NC}" | tee >( sed 's/\x1b\[[0-9;]*m//g' >> ${gtotree_log} )
 
 if [ $hmm_file == "Universal" ]; then
-    hmm_file="Universal_Hug_et_al"
+    hmm_file="Universal-Hug-et-al"
     universal_SCGs_used="true"
 fi