Added a copy method to Medium object

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v1.3.9
+## xx/xx/2017
+
+1. [](#improved)
+    * Added `Medium::copy()` method to create a copy of a medium object
+
 # v1.3.8
 ## 10/26/2017
 

system/src/Grav/Common/Page/Medium/Medium.php

@@ -72,6 +72,16 @@ class Medium extends Data implements RenderableInterface
         $this->reset();
     }
 
+    /**
+     * Create a copy of this media object
+     *
+     * @return Medium
+     */
+    public function copy()
+    {
+        return clone($this);
+    }
+
     /**
      * Return just metadata from the Medium object
      *