Add build script

Author: hernanrz

.gitignore

@@ -1,2 +1,3 @@
 /vendor/*
-composer.phar
+composer.phar
+sample.phar

build/compile.php

@@ -0,0 +1,14 @@
+<?php 
+/**
+* Packages everything into a nice PHAR archive
+*/
+
+if(file_exists('emulator.phar')) {
+  unlink('emulator.phar');
+}
+
+$phar = new Phar('emulator.phar', 0, 'emulator.phar');
+
+$phar->buildFromDirectory(dirname(__DIR__));
+$phar->delete('composer.phar');
+$phar->setDefaultStub('emulator/emulator.php');