Add example sketch.

Add a constructor to improve backwards compatibility.

Add a function to check an alarm flag without resetting it,

and another function to reset an alarm flag.

Fix the example right this time.

Fix bug in example.

Closes #77.

Add depends to library.properties. Closes #73.

Update alarm primer.

Add rtcTimeTemp example sketch.

Add rtc_temperature example sketch.

Fix temperature() function for ARM architecture.

(int is 16 bits for AVR, 32 bits for ARM.)

README clarification, additional example sketches.

Closes #65.