README.md: 2.3 -> 2.4
README.md: 2.3 -> 2.4

git-svn-id: 0d31da9e303333003508381311333cf78a25d41b@1845243 13f79535-47bb-0310-9956-ffa450edef68

apache/commons-configuration,apache/commons-configuration,apache/commons-configuration