assert on the presence of refs after MdmAddCommand runs
assert on presence of release repo dir and on contents for MdmAdCommand
determine checked out version of a dependency module by parsing branch names instead of tags.  in the future, the creation of a tag on the release branches will be removed as it is now unnecessary.
safer handling of parsing of version names.
add descriptions to the 'run-tests' and 'run-mdma' build targets so they show up listed as "main" targets when `ant -p`.