WIP: Event generic

This branch replaces the former, rather slow isCurrentEventActive query by a faster implementation based on large integer division using base 1200.

examples/int_div_example.c

@@ -90,10 +90,10 @@ int main(void) {
 #endif
 
   /* additional calls (test interfaces). */
-  t_number p1; /* dividend */
+  t_large_int p1; /* dividend */
   convert_to_basis(day_fraction1 * (t_lid_int) 20, &p1, 2, 0);
   convert_to_basis(days1, &p1, W_DIGITS-3, 3);
-  print_number(p1);
+  print_large_int(p1);
 
   printf("test program done after %d tests.\n", NREPEAT);
   exit(0);