Parse add rule



   void parse_add_rule(string verb, string rule);


   Here "verb" is the command word (e.g. "look", "read" etc), The "rule" is the parsing rule to add. Rules are made up from two parts - tokens, and prepositions. Tokens are used to match various objects or strings, and prepositions are fixed positional words to specify meaning (like "with" or "in").
   The MudOS accepts six tokens that I'm aware of:

   OBJ - matches a single object
   OBS - matches one or more objects
   LIV - matches a single, living object
   LVS - matches one or more living objects
   WRD - matches a single word
   STR - matches one or more words