- The MENU_BUILDER library has returned. It is needed by ACCOUNT so the
  code must go in global. The code was taken from COMMAND which now
  inherits MENU_BUILDER.
- TEXT_MENU can no longer inherit API_ACCOUNT as ACCOUNT uses it.
  COMMAND_D now inherits API_ACCOUNT directly as it previously relied on
  TEXT_MENU inheritance.
- TEXT_MENU now calls request_user_input directly instead of via
  API_ACCOUNT.
- The ACCOUNT object will now display a text based menu following a
  successfuly login. Currently, you may only log in existing characters
  or quit completely. Character creation and deletion is not yet
  complete.