Added slots to standard-class in standard-class.el
* metaobjects/standard-class.el (header): added version 0.3 to history
  section; added new slots to commentary section
  (moped-standard-class-direct-subclasses): renamed
  `moped-standard-class-subclasses' ->
  `moped-standard-class-direct-subclasses'
  (moped-standard-class-class-precedence-list): new constant; position
  of slot class-precedence-list
  (moped-standard-class-finalized-p): new constant; position of slot
  finalized-p
  (moped-standard-class-direct-methods): new constant; position of
  slot direct-methods
  (moped-standard-class-type): new constant; position of slot type
  (moped-initialize-instance-standard-class): handle new slots
  (moped-slot-value-using-class-standard-class): handle new slots