Updated README.adoc for 1.3

- Also added a CHANGELOG.adoc

Change-Id: I36b5d8ad0d5288e5a5a5597e569a1f8deb31aa2a
Lowered pre-req back down to Maven 3.0.4

Change-Id: I14d3c4ab93ff491a862a18bb6e9382b8a128bb8e