Fix #109 - touchz support for multiple items

Initial interface supports list as input for touchz, but snakebite only
handled the first _created_ file and then stopped. Add support for
multiple items.
Where are all these methods used? You add them here but most of them are not used.

Also, kind of worrying to see snakebite shell out to hadoopcli, I thought the purpose of snakebite was to avoid spawning a java subprocess. No?