Upgraded to 0.8.1.1
Upgraded ZooKeeper to 3.3.4 to same version used by LinkedIn

See http://kafka.apache.org/documentation.html#zk about bug in ZooKeeper 3.3.3 that
we want to avoid
Explicity set Scala version to compile against for better performance
Build without signing the archives
Merge pull request #2 from matthewpflueger/master

Minor version upgrades and build without signing archives