This code is just an edit of some code from a tutorial on the Arduino website called CapacitanceMeter for the LiquidCrystal library. It really isn't that much.
I came to release this code due to high demand:
To all the poeple that waited forever for this code (i stalled the release for about 2 years): I'm truly sorry ;(
For a detailed schematic and original code (which uses the serial port): http://arduino.cc/it/Tutorial/CapacitanceMeter