get calls (not just this one!) need buffer/memory controll. ZK will not malloc for us. Without this change znode data cannot be read out. This change only allows up to 2K data to be read, but a znode can have up to 1MB of data, so it probably needs a more clever mechanism.
For some odd reason, having this method causes a runtime lua error on "require zklua" with current libzookeeper_mt.so. Tested under linux.
* fixed install dir for zklua