Create nested list based on filenames and batch sizes

batched_set_list_creator

Version	Tool Shed	Owner	Galaxy instances where the tool is available
3.3	toolshed.g2.bx.psu.edu	galaxyp	usegalaxy.eu usegalaxy.no
3.3	toolshed.g2.bx.psu.edu	galaxyp	usegalaxy.org.au