[galaxy-commits] commit/galaxy-central: greg: Add a new tool shed mercurial utility module named hg_util.py and begin to extract hg related utility functions out of the shed_util_common.py module. Enhance the functions that display the mercurial changeset rev and hash string to display one or the other or both. Display only the rev and not the hash string on the prominent grids in the tool shed, but continue to display the hash string on admin grids.