Publish artifacts to Maven Central?

[jgallimore]

One of the things I was attempted to achieve in this PR: #102 was get artifacts pushed to Maven. This certainly seems to work for pushing to a local repository on my development machine.

It could be useful to push some SNAPSHOT builds to Maven so that folks can start using this without needing to build from source (which would prove useful for some work I'm doing with the Maven plugin my PR adds).