Mahout 1464

MAHOUT-1464 looks ready to me but can't push it yet.

My build is broken from an unrelated mr-legacy test so I'll wait to push it until my local build passes but wanted to get this out for review if anyone cares.

I took out the epinions and movielens examples, will add them back in with the CLI driver maybe. 
yes, I don't see what they did here. it looks correct in the editor. I get this occasionally and haven't figured it out. Often with diffs that you are merging. I end up merging white space that looks identical.