Report unconnected ports

fixes #218
Unconnected ports are now reported

See merge request !53

myBeTriggered in AbstractStage.onSignal

See merge request !52

Active declaration

fixes #174
renamed addThreadableStage to declareActive and added a flag to Stage indicating if the current stage is active or not

See merge request !54

Conflicts:
	src/main/java/teetime/framework/A3PipeInstantiation.java

added logging to A3PipeInstantiation

typo

Unconnected ports are now reported

signals get checked, if they should be passed on (merger logic moved to
AbstractStage)

added runNow for testing purposes

Abort init

fixes #170

See merge request !51