Introduce a simple timer API....
One can use add_timer or schedule_timer to add a timer. After
the timeout time has been reached the callback will be called.
One can call add_time/schedule_timer and del_timer from within
the callback.
diff --git a/tests/timer/Makefile.am b/tests/timer/Makefile.am
new file mode 100644
index 0000000..726fb7f
--- /dev/null
+++ b/tests/timer/Makefile.am
@@ -0,0 +1,5 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include
+bin_PROGRAMS = timer_test
+
+timer_test_SOURCES = timer_test.c $(top_srcdir)/src/timer.c $(top_srcdir)/src/select.c
+