Version 0.04
        - Option -U added to give a warning if a SUBROUTINE is called 
          which is not declared in any input file.

Version 0.05
        - Options -s and -c added to write file name and line number of each
          found SUBROUTINE and CALL statement to a file.

Version 0.06 
        - Variables for line numbering changed to long int, so the old
          limit of only totally 32768 (machine dependend: int) lines was 
          changed to a limit of 2147483647 (machine dependend long
	  int) lines.

        - Error corrected: If there was no definition of a SUBROUTINE
                           after the PROGRAM statement the program did
                           not work correctly: 
                           The structure of the program was not printed.

        - Warning and erro messages  are now printed on standard error
	  channel.

Version 0.07
	- An option -R for omitting following recursive routine calls
	  is added. As a consequence of this option only the first
	  call of a SUBROUTINE is followed up to the last CALL. 
	  Further CALL statements give only the first SUBROUTINE
	  without printing of the following calls.

Version 0.08
	- The option -f is added. So the output can be dired to a file
	  with the programs name and the ending '.FLOW'.

Version 0.08 - Version 0.10
        - Minor bug-fixes

Version 0.11 - Version 0.12
        - New Option added: Now a SUBROUTINE could be set as a starting point
          for the flow diagram instead of the whole PROGRAM.