Add meta example for KMeans when using an observer.
Add meta example for KMeans when using an observer.

karlnapf/shogun,besser82/shogun,lambday/shogun,geektoni/shogun,lisitsyn/shogun,geektoni/shogun,geektoni/shogun,besser82/shogun,shogun-toolbox/shogun,geektoni/shogun,lisitsyn/shogun,besser82/shogun,shogun-toolbox/shogun,besser82/shogun,lisitsyn/shogun,lambday/shogun,karlnapf/shogun,besser82/shogun,lambday/shogun,lisitsyn/shogun,lambday/shogun,lisitsyn/shogun,lambday/shogun,shogun-toolbox/shogun,lisitsyn/shogun,geektoni/shogun,geektoni/shogun,karlnapf/shogun,shogun-toolbox/shogun,karlnapf/shogun,karlnapf/shogun,shogun-toolbox/shogun,shogun-toolbox/shogun,karlnapf/shogun,besser82/shogun,lambday/shogun