Zookeper module name

[pheaver]

The module name is currently just Zookeeper. To release this package on hackage, the module name should fit into the hierarchical namespace described here:

http://www.haskell.org/haskellwiki/Hierarchical_module_names

I'm not really sure what the right name should be. Although zookeeper isn't exactly a database, it is similar enough to something like redis, which is in Database.Redis, so maybe it should be Database.Zookeper.

[bitemyapp]

Please fix this before pushing to Hackage please.