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diff --git a/vendor/zendframework/zend-stdlib/src/Message.php b/vendor/zendframework/zend-stdlib/src/Message.php
new file mode 100644
index 000000000..11ec16330
--- /dev/null
+++ b/vendor/zendframework/zend-stdlib/src/Message.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Stdlib;
+
+use Traversable;
+
+class Message implements MessageInterface
+{
+    /**
+     * @var array
+     */
+    protected $metadata = [];
+
+    /**
+     * @var string
+     */
+    protected $content = '';
+
+    /**
+     * Set message metadata
+     *
+     * Non-destructive setting of message metadata; always adds to the metadata, never overwrites
+     * the entire metadata container.
+     *
+     * @param  string|int|array|Traversable $spec
+     * @param  mixed $value
+     * @throws Exception\InvalidArgumentException
+     * @return Message
+     */
+    public function setMetadata($spec, $value = null)
+    {
+        if (is_scalar($spec)) {
+            $this->metadata[$spec] = $value;
+            return $this;
+        }
+        if (! is_array($spec) && ! $spec instanceof Traversable) {
+            throw new Exception\InvalidArgumentException(sprintf(
+                'Expected a string, array, or Traversable argument in first position; received "%s"',
+                (is_object($spec) ? get_class($spec) : gettype($spec))
+            ));
+        }
+        foreach ($spec as $key => $value) {
+            $this->metadata[$key] = $value;
+        }
+        return $this;
+    }
+
+    /**
+     * Retrieve all metadata or a single metadatum as specified by key
+     *
+     * @param  null|string|int $key
+     * @param  null|mixed $default
+     * @throws Exception\InvalidArgumentException
+     * @return mixed
+     */
+    public function getMetadata($key = null, $default = null)
+    {
+        if (null === $key) {
+            return $this->metadata;
+        }
+
+        if (! is_scalar($key)) {
+            throw new Exception\InvalidArgumentException('Non-scalar argument provided for key');
+        }
+
+        if (array_key_exists($key, $this->metadata)) {
+            return $this->metadata[$key];
+        }
+
+        return $default;
+    }
+
+    /**
+     * Set message content
+     *
+     * @param  mixed $value
+     * @return Message
+     */
+    public function setContent($value)
+    {
+        $this->content = $value;
+        return $this;
+    }
+
+    /**
+     * Get message content
+     *
+     * @return mixed
+     */
+    public function getContent()
+    {
+        return $this->content;
+    }
+
+    /**
+     * @return string
+     */
+    public function toString()
+    {
+        $request = '';
+        foreach ($this->getMetadata() as $key => $value) {
+            $request .= sprintf(
+                "%s: %s\r\n",
+                (string) $key,
+                (string) $value
+            );
+        }
+        $request .= "\r\n" . $this->getContent();
+        return $request;
+    }
+}