Added a note about manually creating directories in Galaxy quick start instruction page
Added a note about manually creating directories in Galaxy quick start instruction page

phac-nml/irida,phac-nml/irida,phac-nml/irida,phac-nml/irida,phac-nml/irida,phac-nml/irida,phac-nml/irida,phac-nml/irida