changed build script to install kazoo for zookeeper in python
refactored zookeeper python interface to use kazoo
finished refactoring to meet hawkeye ndb baseline
fixed all unit and functional tests
removed unnecessary log statements
fixed zookeeper utility files
merged with org/testing
removed dead code and updated unit tests accordingly
removed blacklist cache and other dead code
fixed unit test that was using removed blacklist cache
Merge pull request #430 from shatterednirvana/kazoo

Using Kazoo for ZooKeeper interactions