Engage's version number wasn't updated from 0.1-SNAPSHOT to 0.1 before cutting the Engage 0.1 tag

In Engage server's pom.xml file, we forgot to update the artifact version number from 0.1-SNAPSHOT to 0.1. This also needs to be updated in the Ant build's build.xml file. This is a blocker for Engage 0.1's release.