mjsousa [Thu, 31 Jul 2014 17:49:44 +0100] rev 919
Add support for the 'NULL' keyword, defined in version 3 of IEC 61131-3.
mjsousa [Tue, 29 Jul 2014 13:39:40 +0100] rev 918
for option '-Op' (generate <pouname>.h/c): add '#include <pouname>.h' to the .c file, and '#ifdef <pouname>_H' to the .h file