Source 0.1 beta

Hi i´m going to publish the source code, there are two versions :

1- Based in analogRead just use 1 pin to read all the buttons, is based on the DFRobot LCD Keypad (Diagram) (here you can buy it) 

http://pastebin.com/kCdQL13Z

if you can get the same resistences you have to buy some similars and then calibrate the code. (TODO : make a calibrator)

2- Based on the old version , Using digitalRead use uno pin for each button just use 10k resistors. This code is for arduino mega, you have to change the pins configurations

http://pastebin.com/4JNfx5g4

Sorry for my bad english!