https://github.com/google/protobuf/blob/master/java/pom.xml
This isn't good enough to publish to Maven Central but will at
least allow users to publish to their local maven repository
using 'mvn install'
Change-Id: I91ea146cf7c5263fcf5d9823f70bb1ef0158f9a6
Tested: 'mvn install' runs succesfully and produces a .jar
Patrick Julien