added maven project outline idea

Hi this is a simple example to provide a basic maven project outline.
At the moment I have simply copied the sesame2 files under a specific module, and referenced the jar artifact for JDBC4 on a local path for simple usage.

TODO: add JDBC as maven module
TODO: add Jena as maven module

TODO: refactorize package names. For example 'virtuoso' could be: 'com.operlinksw.virtuoso'