Fixing now() function

The now() function was defined using the #define directive. That is
wrong as it prevents using the keyword "now" in other situations.

STM32F1/libraries/RTClock/src/RTClock.h

@@ -52,7 +52,9 @@ class RTClock {
 	
 	time_t getTime();
 	void getTime(tm_t & tmm );
-		#define now getTime
+
+    time_t now() { return getTime(); }
+	void now(tm_t & tmm ) { getTime(tmm); }  // non-standard use of now() function, added for compatibility with previous versions of the library
 
 	uint8_t year(void)    { getTime(tmm); return tmm.year; }
 	uint8_t month(void)   { getTime(tmm); return tmm.month; }
@@ -100,4 +102,4 @@ class RTClock {
 
 
 #endif // _RTCLOCK_H_
-                                                                                        
+