JVM default classloader assembly

Hi Serge

I looked into the issue I had with the classloader, mentioned here https://github.com/SR-G/sonos-java/pull/8#issuecomment-16141400
This pull request provide a more maven oriented solution.

As mentioned in the commit messages the result of this is that "mvn clean dependency:copy-dependencies install assembly:assembly -Dmaven.test.skip=true"
can be replaced with a "mvn clean package" command. This is, if both commits are accepted. This is only a change for the sonos-java destribution, and no files is removed from the result.

cheers
Phylock