FIX: ARM shared libary for RPi (Issue #6)

I found a shared libary for Raspberry Pi on this page [lightput](http://lightput.com/libftd2xx_1.1.12_Raspberry_Pi_Fix.tar.gz).

I put the archive in my github repository and edit install.sh

![rpi_fix](https://cloud.githubusercontent.com/assets/7436938/3868849/baecc71c-2069-11e4-9768-ab4186e0517b.png)