added timezone support

include/rtctime.h

@@ -3,6 +3,7 @@
 
 #include "globals.h"
 #include <Time.h>
+#include <Timezone.h>
 #include <Wire.h> // must be included here so that Arduino library object file references work
 #include <RtcDS3231.h>
 
@@ -19,9 +20,9 @@ typedef enum {
 } clock_state_t;
 
 extern RtcDS3231<TwoWire> Rtc; // make RTC instance globally available
+extern Timezone myTZ; // make Timezone myTZ globally available
 
 int rtc_init(void);
-void sync_rtctime(void);
 int set_rtctime(uint32_t UTCTime);
 int set_rtctime(RtcDateTime now);
 void sync_rtctime(void);