Scripting environment descriptions
----------------------------------

Property list containing dictionary with keys:

Name                
    Name of scripting description

Use
    Array of scripting descriptions to include.


Modules
    Array of modules to be loaded
    
Finders
    Array of object finder names to be used

Behaviours          
    Dictionary of behaviour descriptions, that can be adopted by a class or 
    another behaviour.
                    
Classes            
    Dictionary of class descriptions.
    
DefaultRestriction


Aliases      object name aliases (not impl.)


Behaviours
----------
Use                 
    Adopt behaviour

SymbolicSelectors   
    Map of symbolic selectors.
    
Aliases
    Method name aliases.

AllowMethods
    List of allowed methods.
    
DenyMethods       
    List of denied methods.



Classes 
-------
(Same items as in Behaviours)

Super
    Super class name.
    
Restriction
    Values: DenyAll, AllowAll
    
    "DenyAll" deny all methods except those in "AllowMethods" list or 
              in "Aliases"
    "AllowAll" allow all methods except those in "DenyMehods" list.