made help text more precise
made help text more precise

najoshi/sickle,MullinsLab/sickle,FabianFrancoRoldan/sickle,kdmurray91/sickle,MullinsLab/sickle,MullinsLab/sickle,biorelated/sickle,jdidion/sickle,ucdavis-bioinformatics/sickle