[PrematureStopping] Add premature stopping to CrossValidation.
[PrematureStopping] Add premature stopping to CrossValidation.

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