Addd release notes and sort.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/exec/trunk@1554222 13f79535-47bb-0310-9956-ffa450edef68
Addd release notes.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/exec/trunk@1554223 13f79535-47bb-0310-9956-ffa450edef68