add screensaver and optimize performance

Signed-off-by: Peter Siegmund <developer@mars3142.org>

components/bob/bob.c

@@ -0,0 +1,8 @@
+#include "bob.h"
+
+#include "persistence.h"
+
+void bob_init(void)
+{
+    persistence_init("system_control");
+}