Unzip the LiquidCrystal_v1.2.1.zip
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 My Documents>Arduino>libraries

*This library is compatible in Arduino 1.0.6 and 
 Arduino 1.6.9 version."

Wiring Connections:
VCC - 5V
GND - GND
SDA - A4 (pin 18)
SCL - A5 (pin 19)