Merge pull request adafruit#9 from hecko/patch-1

Corrected #include for case-sensitive filesystems

RTClib.cpp

@@ -11,7 +11,7 @@
 #define SECONDS_FROM_1970_TO_2000 946684800
 
 #if (ARDUINO >= 100)
- #include <arduino.h>
+ #include <Arduino.h> // capital A so it is error prone on case-sensitive filesystems
 #else
  #include <WProgram.h>
 #endif
@@ -20,7 +20,7 @@ int i = 0; //The new wire library needs to take an int when you are sending for
 ////////////////////////////////////////////////////////////////////////////////
 // utility code, some of this could be exposed in the DateTime API if needed
 
-static uint8_t daysInMonth [] PROGMEM = { 31,28,31,30,31,30,31,31,30,31,30,31 };
+const uint8_t daysInMonth [] PROGMEM = { 31,28,31,30,31,30,31,31,30,31,30,31 }; //has to be const or compiler compaints
 
 // number of days since 2000/01/01, valid for 2001..2099
 static uint16_t date2days(uint16_t y, uint8_t m, uint8_t d) {