1) make addPackageVersion() deal with redundant adds properly 2) added delPackagetVersion(), mergePackageListChanges()
1) make addPackageVersion() deal with redundant adds properly
2) added delPackagetVersion(), mergePackageListChanges()

sassoftware/conary,sassoftware/conary,sassoftware/conary,sassoftware/conary,sassoftware/conary