add include <time.h>, required for time_t

improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- increase hardcoded limit to 499

improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- Add comments!!

improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)"

Fix method ./configure uses to determine bison version (did not work in bourne shell) (submitted by anonymous)"

fix bug: allow variables with names starting with 'var' to be used in the first line of POU body

Abort compilation when finding R_EDGE or F_EDGE

Fix bug: XOR operator was broken for ANY_BIT types. No XOR__[DL]WORD__[DL]WORD functions were generated.

Add some comments to code regarding backup/restore functions

fix initialization of variable (was not following ISO C++ rules)

make generating backup/restore functions a command line option (off by default).

add support for generating functions to backup/restore the internal state of the PLC.

delete unused variable.

handle POUs with no VAR .. END_VAR blocks