Save mod table & save fail cmd

* Added table for saving throw modifiers to make them more traceable and explainable, along with the --set-savemod command to add, change and remove mods.
* Corrected default ToHit dice spec in getToHitRoll().
* Replaced MIrowref lookup with itemIndex in attack commands as may be wrong at time of attack.
* Added ^^distPB^^, ^^distS^^, ^^distM^^,  and ^^distL^^ tags to Ranged Weapon attack macro templates to display range distances.
* Add an optional fail command to saving throw macros, to support targeted saves provided by RoundMaster.
* Add automatic saves on natural 20 & fail on 1, switchable as a configuration option

Author: DameryDad