Corrected title filter behavior.

The title filter will now correctly lowercase the non first letter
like the regular Python filter does.

This fixes #251.
diff --git a/CHANGES b/CHANGES
index 01afc4e..6079411 100644
--- a/CHANGES
+++ b/CHANGES
@@ -13,6 +13,8 @@
 - Fixed some warnings with hashing of undefineds and nodes if Python
   is run with warnings for Python 3.
 - Added support for properly hashing undefined objects.
+- Fixed a bug with the title filter not working on already uppercase
+  strings.
 
 Version 2.7
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