Fix some issues that occur on 64-bit clients #1
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I found that using Int32 is not correct on 64-bit clients. The zookeeper client uses a C int type that corresponds to Int in Haskell (it's 32-bit or 64-bit depending on the architecture), so I changed Int32 to Int.
I also used preallocated buffer buffer for some actions instead of allocating each time.
I'd like to start using the LionTamer stuff in production, but I think I need to clean it up a bit first. One thing is I need to remove the putStrLn lines.