Replaced several core classes from DD with new classes to enforce
integrity checks. Rewriting everything that depended on those classes is
a massive undertaking but it should simplify our code and prevent the
many bugs we've seen lately. The rewrite isn't done yet, just committing
my progress so far.
Renamed CommandRegenPocket to CommandResetDungeons. Changed command name
accordingly. Added a message for the user listing the number of dungeons
that were reset. Modified DimHelper slightly to add support for this.
Added error condition if user specifies arguments for the command.
