Trying to get optional jar files using maven

Tried pulling down all the optional jar files so I could get a clean compile in Eclipse. Some warnings indicated some dependency upon maven 2.0.6, but my local version of maven is 2.0.4. Not sure what to do there. It seems like using Eclipse would be a good way to go, and I would expect other developers to be using Eclipse as well, but I am not having any luck getting it set up. Running build.sh does seem to run, but it does not seem to build much. Most jars are skipped "because no files were included". Not sure what this means.