Add documentation and add back host parameter just for scheduling
Merge branch 'feature/seqware-1858_refactor_workflowlauncher' of github.com:SeqWare/seqware into feature/seqware-1858_refactor_workflowlauncher

Conflicts:
	seqware-ext-testing/src/test/java/net/sourceforge/seqware/pipeline/plugins/PluginRunnerET.java