improve images.jo -> datasets.jo syncing to always skip images by name
improve images.jo -> datasets.jo syncing to always skip images by name

starting with 'sngl'

joyent/sdc-imgapi,numericillustration/sdc-imgapi,numericillustration/sdc-imgapi,joyent/sdc-imgapi,numericillustration/sdc-imgapi,joyent/sdc-imgapi