Changes to log lines based on #85. More changes pending.
Changes to log lines based on #85. More changes pending.

* readable log lines.
* log lines from tasks follow the structure <TaskId> <description> <additional_info>

Parsl/parsl,Parsl/parsl,Parsl/parsl,Parsl/parsl,swift-lang/swift-e-lab,swift-lang/swift-e-lab