[DependencyInjection] added CHANGELOG

CHANGELOG-2.1.md

@@ -190,10 +190,6 @@ To get the diff between two versions, go to https://github.com/symfony/symfony/c
  * added a class map generator
  * added support for loading globally-installed PEAR packages
 
-### DependencyInjection
-
- * component exceptions that inherit base SPL classes are now used exclusively (this includes dumped containers)
-
 ### Form
 
  * [BC BREAK] ``read_only`` field attribute now renders as ``readonly="readonly"``, use ``disabled`` instead

src/Symfony/Component/DependencyInjection/CHANGELOG.md

@@ -0,0 +1,12 @@
+CHANGELOG
+=========
+
+2.1.0
+-----
+
+ * added IntrospectableContainerInterface (to be able to check if a service
+   has been initialized or not)
+ * added ConfigurationExtensionInterface
+ * added Definition::clearTag()
+ * component exceptions that inherit base SPL classes are now used exclusively
+   (this includes dumped containers)