Metacat

move DocInfo parsing into utilities project so that it can be used by Morpho as well as Metacat.
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5737

refactor Metacat access handling to be on a per-revision basis so that it more closely aligns with the DataONE approach
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5560

merging changes from branch

merging test changes into the trunk

Fix errors in workflow scheduler unit test

Beef up comments

Add access api test and supporting files