I too have bought this shield and when I go to the GITHUB page, the download button they keep saying is there in discriptions:
This is a library for the Adafruit PN532 NFC/RFID breakout boards
This library works with the Adafruit NFC breakout and shield
Check out the links above for our tutorials and wiring diagrams
These chips use SPI or I2C to communicate
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada & Kevin Townsend for Adafruit Industries.
BSD license, check license.txt for more information
All text above must be included in any redistribution
To download. click the DOWNLOADS button in the top right corner, rename
the uncompressed folder Adafruit_NFCShield_I2C. Check that the
Adafruit_NFCShield_I2C folder contains Adafruit_NFCShield_I2C.cpp and
Place the Adafruit_NFCShield_I2C library folder your
<arduinosketchfolder>/libraries/ folder. You may need to create the
libraries subfolder if its your first library. Restart the IDE.
Never seems to appear. I am using IE on windows 7 ultimate, so I would hope I am up to date enough to view an website properly, but the fact I cant find anything to download is a bit frustrating.
I downloaded the free github yesterday thinking it was the download button talked about, however; it did not do anything more than put Repositories? on my hard drive, or so it seems. Sorry, but all this jargon seems a bit over my head as I am just getting into Electronical Engineering, I still need plain English to get the code to make the RFID card work, so if anyone could help, I would greatly appreciate it.