o Added AttachedArtifact, and changed the DefaultMavenProjectHelper to create and attach artifacts of this type. AttachedArtifact uses a parent artifact (constructor parameter) for versioning and basic identity attributes, but requires the user to specify a type and classifier specific to the new artifact. We may want to add flexibility for artifactId, too...though I have reservations on that score.
o See it0079 for a test.
git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@293497 13f79535-47bb-0310-9956-ffa450edef68