Maven Deploy Snapshots and Stage Releases with Ant

Hi Dan Dyer

I made change for deploy jar into Maven central repository. Please review and take my change. 


Reference: https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide#SonatypeOSSMavenRepositoryUsageGuide-7c.DeploySnapshotsandStageReleaseswithAnt