code: def receives(self, idA, idB):
          
          objA = self.chart.get(idA)
          objB = self.chart.get(idB)
          asp = aspects.isAspecting(objB, objA, const.MAJOR_ASPECTS)
          return self.inDignities(idB, idA) if asp else []
docs: Returns the dignities where A receives B.
          A receives B when (1) B aspects A and (2) B is in 
          dignities of A.