Maven build files

Hi,
Here are the Maven files again.  Hopefully I did that cherry-pick correctly.  I'm still a bit new to git, so thanks for your patience.

Please note that this includes files for the base and wet themes, and the version number is presently set to 3.0.6-SNAPSHOT.  
I've described the process of Maven artifact generation in the wiki here: https://github.com/wet-boew/wet-boew/wiki/Maven-Artifact-Generation