Add Stringy\create function for PHP 5.6

tests/CreateTest.php

@@ -0,0 +1,16 @@
+<?php
+
+require __DIR__ . '/../src/Create.php';
+
+use function Stringy\create as s;
+
+class CreateTestCase extends PHPUnit_Framework_TestCase
+{
+    public function testCreate()
+    {
+        $stringy = s('foo bar', 'UTF-8');
+        $this->assertInstanceOf('Stringy\Stringy', $stringy);
+        $this->assertEquals('foo bar', (string) $stringy);
+        $this->assertEquals('UTF-8', $stringy->getEncoding());
+    }
+}