Download the complete libraries here.
Copy the content of the ZIP-Archive to your Arduino library folder /arduino/libraries/ or to your Arduino user documents folder /My Documents/Arduino/libraries/.
If there are existing folders from a previous installation, please delete them before copying.
Further infos: http://arduino.cc/en/Guide/Libraries and http://arduino.cc/en/Hacking/Libraries
See license.txt.
Each package has its own copyright and license agreement, and it is your responsibility to comply with the terms of those agreements.