.gitignore: IntelliJ IDEA's files were added (.iml, .idea)
logback is now used as logger in BigStressTest and ShardingTest
Some minor logging updates in these two were also done
readBytes() and writeBytes() from network protocol was moved to newly created dbfall2013.util.Data{In,Out}putStream
InetSocketAddr is now used instead of pair (InetAddr, port) in the following:
  ShardDescription, ShardingConfiguration, ShardingNode, ShardingTest, Bootstrapper,
  sharding.yaml