Handle EOFError for NoOp & Add components. If connected to external interface, but no IIP getting in-port value will fail.
Use "isInport" keyword arg to match scheduler.util.editor.export() API.
Prevent default keyword args from being returned to the caller. They are *not* created as new objects at call-time. Classic Python gotcha!
The test_start() unittest calls wrong start() method. Switched schd.network.start() to schd.util.plumber.start()
Add unittests for scheduler.network methods.