Add CLI command to list builds defined in Fudgefile

Add a command to the CLI to list the builds that have been defined in
the Fudgefile.  The list includes the builds' names and their
descriptions (for builds that were provided one).
Update version and release notes.
Merge pull request #96 from KevinBrowne/list_builds_with_descriptions

Add CLI command to list builds defined in Fudgefile