Addition of hairy_root_transformation (study), leek_epidermis_bomardment...

Addition of hairy_root_transformation (study), leek_epidermis_bomardment (study), microscopy_leek_epidermis (assay) and visual_ovservation_hairy_roots (assay) with isa tabels, data (raw and processed of the data shown in the paper) and protocols where applicable.