Add functions to get current timestamp

mmss/mmss.c

@@ -31,6 +31,11 @@
 #include <stdlib.h>
 
 
+gmrf_time_t gmrf_now(gmrf_t *gmrf) {
+	return gmrf->mmss->now;
+}
+
+
 static void init_nodes(gmrf_t *nodes) {
 	gmrf_t *node;
 	for (node = nodes; node; node = node->next) {