Synchronise maven artefacts with Maven Central repo

To do this we need to ensure our artefacts comply with Central's requirements.

Here's my code for checking:

https://github.com/paulrobinson/maven-central

We also need to make sure that the artifacts don't depend on anything that isn't in Central. I think this can be done by building JBossTS clean with no refrence to Nexus in the .m2/settings.xml and with an empty local maven repo.