Dependencies can now pass output to each other using the DependentTaskHandler.
Also fixed some general problems in the Tasks class, for instance the Executor not starting correctly because of problematic parameters.
Also, SuperVisor now sets the output of a Task using the last output of the task, and not the first.
Parent Handlers can be stacked to run in succession. Output is transfered as input into the child handler which can continue with it. If the parent Handler fails, all Child handlers also fail.
Handlers should now be added as objects, adding some flexibility to the developer.
Developers are still cautioned to take great care that Handlers work approriately. Handlers can potentially crash the SuperVisor if not taken good care of.
