Change the AutoValue pom.xml so that it uses the Maven shade plugin to i...

Change the AutoValue pom.xml so that it uses the Maven shade plugin to include all dependencies in the generated jar, and to rename most of them. This is intended to address https://github.com/google/auto/issues/156.
Oh... I completely take it back.  You want this to be the main artifact, which is the default.  Been a while since I used shade. :)