Move split function.

include/wordclock_functions.h

@@ -4,6 +4,7 @@
 #include <Arduino.h>
 
 int show_string_on_clock(String message, uint32_t color);
+String split(String s, char parser, int index);
 String time_to_string(uint8_t hours, uint8_t minutes);
 void draw_minute_indicator(uint8_t minutes, uint32_t color);