REFACTOR: Remove getType() override to allow extensibility

- Remove getType() method override so element inherits BaseElement::getType()
- Add $singular_name = 'Media' and $plural_name = 'Media Blocks'
- Allows extensions to customize display name via $singular_name

Fixes #32
Related: dynamic/silverstripe-essentials-tools#68

Author: jsirish

src/Elements/ElementOembed.php

@@ -13,6 +13,16 @@
 
 class ElementOembed extends BaseElement
 {
+    /**
+     * @var string
+     */
+    private static $singular_name = 'Media';
+
+    /**
+     * @var string
+     */
+    private static $plural_name = 'Media Blocks';
+
     /**
      * @var string
      */
@@ -163,14 +173,6 @@ protected function provideBlockSchema()
         return $blockSchema;
     }
 
-    /**
-     * @return string
-     */
-    public function getType()
-    {
-        return _t(__CLASS__ . '.BlockType', 'Media');
-    }
-
     /**
      * isolate src from EmbedHTML for more control over iframe attributes
      *