More diagnostice and v7 effects

* Added feedback to console if invalid token or drawing selected as target for status.
* Added feedback to GM if confirming a status change.
* Updated effects to use new AttackMaster --set-mods command to record mods, with GM controlled conversion function.
* dumpState() function and --dumpState command added to diagnose problems with Roll20 state variable.
* More and better error trapping & type conversion.
* Made doAddStatus() & doRemoveStatus() asynchronous.

Author: DameryDad