BUILDING

  a player parented to $builder is able to create new objects, then
  change their appearance and names they respond to.  their commands are:

  @clone     - creates a child of another object
  @rename    - changes an object's name
  @addalias  - adds a new name to the object's list of aliases.  it will
               respond to this name just like it's normal one.
  @rmalias   - take an alias off of an object
  @recycle   - destroys an object
  @describe  - changes the appearance of an object
  @dig       - creates a new room
  @exit      - creates a way to move from one room to another