Allow ClassName_methodName for a message name, easier to disambiguate duplicates

CHANGELOG.md

Index: CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24bd4fff0b212236ba27a4d625c75db6fbbd1011..e52d6ecb6a90e91376dc3fd9e669bc5df2660366 100644
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+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 0.12.4+1
+  * Allow the name of an Intl.message to be "ClassName_methodName", as
+    well as "functionName". This makes it easier to disambiguate
+    messages with the same name but in different classes.
+
 ## 0.12.4
   * Handle spaces in ARB files where we didn't handle them before, and
   where Google translation toolkit is now putting them.