changelog
    
    
    - Fri, 01 Feb 2013 10:18:47 +0100
 
    - by Mike Becker <universe@uap-core.de> [Fri, 01 Feb 2013 10:18:47 +0100] rev 8
 
    - removed completeness test - the solver automatically returns false when the field is incomplete
 
    - Thu, 31 Jan 2013 18:44:44 +0100
 
    - by Mike Becker <universe@uap-core.de> [Thu, 31 Jan 2013 18:44:44 +0100] rev 7
 
    - added solving algorithm