Install library from Adafruit

git clone https://github.com/adafruit/Adafruit_Python_CharLCD.git

cd ./Adafruit_Python_CharLCD

sudo python setup.py install

sudo apt-get install build-essential python-dev scons swig

Lots of stuff running across the screen, but it ends with:

Finished processing dependencies for Adafruit-CharLCD==1.1.1

sudo apt-get install rpi