feature #2519 Added RuntimeExtensionInterface (lyrixx)

This PR was merged into the 1.x branch.

Discussion
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Added RuntimeExtensionInterface

Commits
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6f08f574 Added RuntimeExtensionInterface

CHANGELOG

@@ -1,5 +1,6 @@
 * 1.35.0 (2017-XX-XX)
 
+ * added RuntimeExtensionInterface
  * added circular reference detection when loading templates
 
 * 1.34.4 (2017-07-04)
@@ -146,7 +147,7 @@
 
  * fixed reserved keywords (forbids true, false, null and none keywords for variables names)
  * fixed support for PHP7 (Throwable support)
- * marked the following methods as being internals on Twig_Environment: 
+ * marked the following methods as being internals on Twig_Environment:
    getFunctions(), getFilters(), getTests(), getFunction(), getFilter(), getTest(),
    getTokenParsers(), getTags(), getNodeVisitors(), getUnaryOperators(), getBinaryOperators(),
    getFunctions(), getFilters(), getGlobals(), initGlobals(), initExtensions(), and initExtension()
@@ -230,7 +231,7 @@
  * fixed limited RCEs when in sandbox mode
  * deprecated Twig_Template::getEnvironment()
  * deprecated the _self variable for usage outside of the from and import tags
- * added Twig_BaseNodeVisitor to ease the compatibility of node visitors 
+ * added Twig_BaseNodeVisitor to ease the compatibility of node visitors
    between 1.x and 2.x
 
 * 1.19.0 (2015-07-31)

src/Extension/RuntimeExtensionInterface.php

@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Twig\Extension;
+
+/**
+ * @author Grégoire Pineau <lyrixx@lyrixx.info>
+ */
+interface RuntimeExtensionInterface
+{
+}