Merge pull request #24 from qwerdee/prevent-tag-duplication

Prevent same tags being repeated multiple times

Author: pedroborges

src/MetaTags.php

@@ -57,6 +57,8 @@ public function __construct(Page $page)
             $this->data = A::merge($this->data, $templates[$page->template()->name()]);
         }
 
+        $this->addTagsFromTemplate();
+
         static::$instances[$page->id()] = $this;
     }
 
@@ -74,8 +76,6 @@ public static function instance($page)
 
     public function render($groups = null)
     {
-        $this->addTagsFromTemplate();
-
         return $this->tags->render($groups);
     }