External Method Changes

  External Method 1.3
  
    Features
  
     - Permissions have been updated to work with the Principia 1.2 and
       later permission-management enhancements.
  
  
  External Method 1.2
  
    Bug Fixes
  
      - TypeError exceptions in external methods were reported
	incorrectly. 
  
    Features
  
      - ExternalMethods now use standard_error_message to report errors.
  
  
  External Method 1.1
  
    This release changes the way that ExternalMethods are bound to 
    folders.  ExternalMethods now bind themselves to their acquisition
    parents, rather than to REQUEST['PARENTS'][0].  This is needed to
    make ExternalMethods useful in trees and exprs.  The 1.1 release of
    Principia is needed for this release of ExternalMethod to
    function correctly.
  

  External Method 1.0.3
  
    Bugs Fixed
  
     - A new copy of an external method was written the first time
       it was used after being loaded from the database.  In addition to
       database bloat, this could also cause strange session/locking behavior.
  
  
  External Method 1.0.2
  
    Bugs Fixed
  
      - Add permissions were not editable.
  
    Features
	
      - If an ExternalMethod takes a single argument, named self, and is
	called with no arguments, then the folder in which the method
	is accessed is passed.  This is handy when the method is called 
	from a document.