Closes #294 - Fluo now uses a chroot suffix in its Zookeeper connection ...

Removed old ZK root prop & added Accumulo ZK connect prop.

Pull request for #294 
Would be nice to somehow point out that interpolation could be used here.... not sure if the syntax is correct, but something like the following.
io.fluo.client.zookeeper.connect=${io.fluo.client.accumulo.zookeepers}/fluo

Comment should encourage user to chroot (more than example) OR point out that no chroot will cause fluo stuff to end up in zk root.  Docs should also point out that users can set diff chroot for diff fluo instances.