Updated the 'Dao.Interpreter.defMethod' function such that the name of the method must be passed to
this function when it is defined. Also, finished writing the definitions for the "do()", "doAll()",
and "query()" built-in methods of the "RuleSet" built-in data type (which is interfaced to
'Dao.Interpreter.RuleSet'). I haven't tested these functions yet though.