Zake

- Use granular locks for watch dictionary mutation

- Add basic check transaction support
- Create all parent paths and child paths in the same lock context
- Address concurrent client variable modification
- Add link to kazoo readthedocs
- Move znode making function to storage
- Ensure all paths are normalized before storage interaction
- Fix custom version in 'stat' response

- Allow how many spawn workers to be specified

- Add ensure_path_async method
- Include makepath on the create_async method
- Add restart functionality
- Add create makepath support
- Add helper ChildrenWatch and DataWatch
attributes (mimicking the kazoo client attributes)
- Add handler subclass that is aware of what has spawned

- Remove wait method

- Fix children deletion.