Create Methods.java

 * This is the core of subroutines whith which I developed 
 * my PhD studies. ONly thing you need is copy and paste
 * this file and linked with the Main.java file.
 *
 * This file has been developed using NetBeans 7.1. However,
 * it is easy to use it in another versions.

This set of subroutines are commented in spanish. I will translate every comment to english soon.