Repository fun-time!

This release does a few things with repositories and how we handle local & remote repos.

• I recommend setting up repository definitions for each remote repo gitflow uses (releases, test-releases, snapshots) in that order, followed by any other repositories your project uses. This is to enforce version resolution order when a stage dependency is purged. (look here, then here, then finally here)
• I recommend adding repository and mirror definitions to an active profile in your maven user settings.
• update-stage-dependencies is a new goal that can purge local repository release versions previously resolved from the 'stage' repository. This should resolve most of the issue documented in #50.
• Execution of plugins and goals which are not defined in the pom should no longer 'error'. #59
• Repository parameters no longer need to be in the id::foo::bar::blah format. You can reference a repository defined in the pom or in an active profile by id only. #64

As always, this release is Available in Maven Central