agile: backlog Create a new command line parameter for data files directories
agile: backlog Clean up meta-data tagger by improving ptree API

- refactored "Add try_get_key to reader" into a much more
  comprehensive story that takes into account the difficulties we're
  experiencing with our usage of ptree.
agile: clock time for backlog and release notes grooming
agile: clock time for boost 1.55 debian package investigation
valgrind: add more suppressions for database