Adapt pom.xml for maven-release-plugin

This plugin will help us to release into maven central.

Note that we had a release 0.0.1, but still using 0.0.1-SNAPSHOT

Change-Id: I0fc879e5cfbcb7a7d7ec48b81238d388d7907890
Changes in pom required by maven central

See http://maven.apache.org/guides/mini/guide-central-repository-upload.html
and https://docs.sonatype.org/display/Repository/Central+Sync+Requirements

Change-Id: I7ec54cc8916be0b8697c981481f93fd4b8f339f9