Implement a couple of workflow engines for development and debugging

Launch using the two engines as follows

    seqware bundle launch --dir target/Workflow_Bundle_HelloOutOfOrder_1.0-SNAPSHOT_SeqWare_1.1.0-alpha.0-SNAPSHOT/ --engine whitestar
    seqware bundle launch --dir target/Workflow_Bundle_HelloOutOfOrder_1.0-SNAPSHOT_SeqWare_1.1.0-alpha.0-SNAPSHOT/ --engine whitestar-sge

or by using the SW_DEFAULT_WORKFLOW_ENGINE key in your .seqware settings

Currently, these engines support running workflows, scheduling, and status checking (for aggregating stdout and stderr)