addBlockage added in CoreObject to add the blockage time in separate function. Called by removeEntity

interruptionActions added as CoreObject method. It is to be called whenever a CoreObject gets interrupted

topologies 31,32,33 are equivalent to 1,17,12 respectively. It is just that Machines are replaced with  OperatedMachines. Results coincide showing that if there is no need for operator the OperatedMachine works like standard Machine. First step in merging the 2objects

operated machine canAcceptAndIsRequested fix so that it calls haveToDispose of giver giving self as argument

operated machine changed so that currentOperator will be None and not 'None' if there is no operator in the machine

main script updated so that whenever a json object is expected and not found the default would be {}. So we do not need to have e.g. empty failures. Changes reflected also in several ropologies

CoreObject updated with methods to calculate the giver and the receiver. Methods in test mode, not called by any object currently

methods of interrupting and reactivating an object were passed to generic ObjectInterruption. This will make the interruptions more flexible

This reverts commit c6fa76ac.

Revert "Remove try/except that can hide programming errors"

This reverts commit 2ce01ae4.

Revert "Output queues in results"

This reverts commit 7dc0cc78.

Revert "Raise an error when attempting to use an invalid scheduling rule on a queue"

This reverts commit 7bca22bf.

Revert "display gantt by job & by station"

This reverts commit 1094e881.