zk-issue-47

[jaeho-kim]

change permission constants (same with zookeeper native perm number and use bit shifting)

[eric]

I'm trying to figure out a reason not to use the bit shifting that is done in the other code that was referenced in #47.

@slyphon: Can you think of a reason not to do this?

        ZOO_PERM_READ = 1 << 0
        ZOO_PERM_WRITE = 1 << 1
        ZOO_PERM_CREATE = 1 << 2
        ZOO_PERM_DELETE = 1 << 3
        ZOO_PERM_ADMIN = 1 << 4

[jaeho-kim]

I just follow previous coding pattern. I think use bit shifting is better than before

[slyphon]

LGTM

[eric]

thanks!