schedule update; every steps of the operator now holds the task_id (if defined) and the entity that is processed

Station from skillDict of operators are added to their coreObjectIds list so that operator pools are created

the matching between stations and technologies is updated. Assembly stations are seperate the workbenches for the moment. CAD1 and CAD2 are different as far as ENG is concerned

Change in the calculation of remainingProcessingTime. ReadJSWIP inherits from ReadJSWorkPlan. + minor corrections