add s3 upload bucket
try another bucket
Add properties for plugin configuration settings.
Report a defined message if plugin skips execution.

This fixes https://github.com/ning/maven-duplicate-finder-plugin/issues/19
SKip test that is broken in travis build.

Due to a bug in the invoker plugin and a bad setting for maven in travis.
resync docs with wiki
Add ability to check duplicates against the boot classpath.

Allows checking of duplicates against the boot classpath (which
contains all the classes and jars that the JDK supplies).