changelog
    
    
    - Wed, 18 Dec 2013 17:44:31 +0200
 
    - by Santeri Piippo <crimsondusk64@gmail.com> [Wed, 18 Dec 2013 17:44:31 +0200] rev 560
 
    - - corrected history behavior. LDObject::clone() is now off-limits, createCopy() must be used instead. LDObject::deleteSelf() must be used to delete LDObjects (destructor is protected now)