My goal in creating yet another DS1307 library was to provide
easy access to some of the other functions I needed from the chip,
specifically its square wave output and its battery-backed RAM.

Documentation:
@todo Mostly comments in RealTimeClockDS1307.h

Examples (in /examples):

RealTimeClockDS1307_Test.pde allow you to turn the clock on/off,
set date/time, set 12/24h, [de]activate the square wave, and
read/write memory from the Serial Monitor.

RealTimeClockDS1307.fz is a Fritzing breadboard layout showing
the basic hookup of the Sparkfun RTC module to an Arduino. Included
is an optional resistor+LED to show the square wave (note that it's
an open drain, so you hook up to it rather differently than, say, 
pin 13).

Changelog:

Version 0.94    -- changed getDate() to getDay() and
                   setDate() to setDay() and updated
                   keywords.txt and the example
                   by Sudar & Andreas Giemza (hurik)

Version 0.93    -- added keywords.txt for syntax highlighting
                   by Andreas Giemza (hurik)
Version 0.92 RC -- Updated for Arduino 1.00; testing with
                   Andreas Giemza (hurik)
Version 0.91    -- added multi-byte read/write
Version 0.9 RC  -- initial release

Future:
 - web page documentation
  
  RealTimeClockDS1307 - library to control a DS1307 RTC module
  Copyright (c) 2011 David H. Brown. All rights reserved
  
  Much thanks to John Waters and Maurice Ribble for their
  earlier and very helpful work (even if I didn't wind up
  using any of their code):
   - http://combustory.com/wiki/index.php/RTC1307_-_Real_Time_Clock
   - http://www.glacialwanderer.com/hobbyrobotics/?p=12

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
