Fixes incorrectly returning TRUE if MUSCLE/Biopython not found
Fixes incorrectly returning TRUE if MUSCLE/Biopython not found

catterbu/receptormarker,catterbu/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,nsh87/receptormarker,daniel0128/receptormarker,catterbu/receptormarker,catterbu/receptormarker,daniel0128/receptormarker,catterbu/receptormarker,nsh87/receptormarker,daniel0128/receptormarker,nsh87/receptormarker,nsh87/receptormarker,nsh87/receptormarker,daniel0128/receptormarker