diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..e8ad548
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,8 @@
+.gitattributes export-ignore
+.gitignore export-ignore
+.scrutinizer.yml export-ignore
+.travis.yml export-ignore
+composer.json export-ignore
+phpcs.xml export-ignore
+phpunit.xml.dist export-ignore
+tests export-ignore
diff --git a/Diff.mw.php b/Diff.mw.php
deleted file mode 100644
index e9fb0bb..0000000
--- a/Diff.mw.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-/**
- * MediaWiki setup of the Diff library as a MediaWiki extension.
- * The library should be included via the main entry point, Diff.php.
- *
- * @since 0.3
- *
- * @license GPL-2.0+
- * @author Jeroen De Dauw < jeroendedauw@gmail.com >
- */
-
-if ( !defined( 'Diff_VERSION' ) ) {
-	die( 'Not an entry point.' );
-}
-
-$GLOBALS['wgExtensionCredits']['other'][] = array(
-	'path' => __FILE__,
-	'name' => 'Diff',
-	'version' => Diff_VERSION,
-	'author' => array(
-		'[https://www.mediawiki.org/wiki/User:Jeroen_De_Dauw Jeroen De Dauw]',
-	),
-	'url' => 'https://github.com/wmde/Diff',
-	'description' => 'Library for diffing, patching and representing differences between complex objects',
-	'license-name' => 'GPL-2.0+'
-);
diff --git a/Diff.php b/Diff.php
index dd9e32e..997d951 100644
--- a/Diff.php
+++ b/Diff.php
@@ -5,13 +5,7 @@
 	return 1;
 }
 
-define( 'Diff_VERSION', '2.1' );
-
-if ( defined( 'MEDIAWIKI' ) ) {
-	call_user_func( function() {
-		require_once __DIR__ . '/Diff.mw.php';
-	} );
-}
+define( 'Diff_VERSION', '2.2' );
 
 // Aliasing of classes that got renamed.
 // For more details, see Aliases.php.
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 66f6c6d..3163b3f 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -3,6 +3,11 @@ These are the release notes for the [Diff library](README.md).
 Latest release:
 [![Latest Stable Version](https://poser.pugx.org/diff/diff/version.png)](https://packagist.org/packages/diff/diff)
 
+## Version 2.2 (2017-08-09)
+
+* Removed MediaWiki extension registration
+* Add .gitattributes file to exclude not needed files from git exports
+
 ## Version 2.1 (2016-09-01)
 
 * Improved various PHPDocs