Updated changelog. [ci skip]

Author: ezzatron

CHANGELOG.md

@@ -1,5 +1,24 @@
 # Enumeration changelog
 
+### 4.0.0 (2013-08-13)
+
+- **[BC BREAK]** `Multiton` method name changes:
+    - `multitonInstances` -> `members`
+    - `instanceByKey` -> `memberByKey`
+    - `instanceBy` -> `memberBy`
+    - `instanceByPredicate` -> `memberByPredicate`
+    - `initializeMultiton` -> `initializeMembers`
+    - `registerMultiton` -> `registerMember`
+    - `createUndefinedInstanceException` -> `createUndefinedMemberException`
+- **[BC BREAK]** `Enumeration` method name changes:
+    - `instanceByValue` -> `memberByValue`
+- **[BC BREAK]** Renamed classes:
+    - `UndefinedInstanceException` -> `UndefinedMemberException`
+    - `UndefinedInstanceExceptionInterface` -> `UndefinedMemberExceptionInterface`
+- **[NEW]** Case insensitive options for member search methods
+- **[NEW]** Defaulting variants of member search methods
+- **[MAINTENANCE]** General repository maintenance
+
 ### 3.0.2 (2013-03-04)
 
 - **[NEW]** [Archer] integration