Library for the Grove I2C Touch Sensor
http://seeedstudio.com/wiki/index.php?title=Twig_-_I2C_Touch_Sensor_v0.93b
 
Prerequisite:
A modification of the Grove I2C Touch sensor is needed
Solder a pin to the INT terminal in the I2C sensor to connect it to one pin in Arduino
 
 Released into the public domain.