String.prototype.nl2br

@Description: Replaces all new line "\n" with HTML break returns "<br />"
@File: String/prototype/nl2br.js
@Author: Paul Visco
@Version: 1.0 11/19/07
@Return: String The original text with lines returns converted to HTML line breaks
@Example:

var myString = "hello\nworld";

var newString = myString.nl2br();
//newString = 'hello<br />world';