taglib/taglib — pull request #260 by TsudaKageyu (2013-07-13 09:46:23+00:00)
Title: Removed an unnecessary method returns StringHandler*.

```ID3V2::Tag``` class has the method ```latin1StringHandler()``` which returns the current ```StringHandler```, but it doesn't need to be accessed from outside.
So I removed it and made some refactoring concerning StringHandler.