Make sure all arguments for process are strings
Make the first argument the name of the executable
Make default process_stopped() set task states
Remove process from process list when stopped
Fix spawn_process argument types
Bugfix in set_task_state()

It is config["master_api"], not config["master-api"]
Bugfix in process_stdout_line(): pid instead of id
Merge pull request #115 from guidow/jobtype_rework_fixes

Jobtype rework fixes