Updating changelog and release notes in preparation of Release 1.3.0

Change-Id: I7f23f55160aca4c8ea90df54889e4f4e0881fc17

git-svn-id: https://svn.apache.org/repos/asf/etch/trunk@1518527 13f79535-47bb-0310-9956-ffa450edef68
3 files changed