removed leftovers from submodule uglifyjs, added credits file,

cleaned up CSS, changed template to output clean XHTML 5,
added unit tests for 60% of the code, found a few bugs by doing
that and fixed them

tst/vizhash16x16.php

@@ -0,0 +1,41 @@
+<?php
+class vizhash16x16Test extends PHPUnit_Framework_TestCase
+{
+    private $_dataDirCreated;
+
+    private $_file;
+
+    private $_path;
+
+    public function setUp()
+    {
+        /* Setup Routine */
+        $this->_path = PATH . 'data' . DIRECTORY_SEPARATOR;
+        $this->_dataDirCreated = !is_dir($this->_path);
+        if($this->_dataDirCreated) mkdir($this->_path);
+        $this->_file = $this->_path . 'vizhash.png';
+    }
+
+    public function tearDown()
+    {
+        /* Tear Down Routine */
+    		if($this->_dataDirCreated) {
+		        helper::rmdir($this->_path);
+        } else {
+            if(!@unlink($this->_file)) {
+            	throw new Exception('Error deleting file "' . $this->_file . '".');
+            }
+        }
+    }
+
+    public function testVizhashGeneratesUniquePngsPerIp()
+    {
+        $vz = new vizhash16x16();
+        $pngdata = $vz->generate('127.0.0.1');
+        file_put_contents($this->_file, $pngdata);
+        $finfo = new finfo(FILEINFO_MIME_TYPE);
+        $this->assertEquals('image/png', $finfo->file($this->_file));
+        $this->assertNotEquals($pngdata, $vz->generate('2001:1620:2057:dead:beef::cafe:babe'));
+        $this->assertEquals($pngdata, $vz->generate('127.0.0.1'));
+    }
+}