6CYANA: read cor - CYANA command

Parameters: file=<filename>.cor            (required)
            structure=<integer>            (default: 1)
            chains=<string>                (default: first)
            rigid                          
            flexible                       
            bfactor                        
            append                         
            newstructure=<integer>         (default: 1)
            append                         
            new                            
            unknown=error|warning|skip     (default: error)
