Typo fixes and other minor changes in multiclass KNN notebook.
Typo fixes and other minor changes in multiclass KNN notebook.

lisitsyn/shogun,lisitsyn/shogun,sorig/shogun,besser82/shogun,shogun-toolbox/shogun,karlnapf/shogun,lisitsyn/shogun,besser82/shogun,lambday/shogun,besser82/shogun,karlnapf/shogun,Saurabh7/shogun,shogun-toolbox/shogun,Saurabh7/shogun,Saurabh7/shogun,shogun-toolbox/shogun,besser82/shogun,geektoni/shogun,Saurabh7/shogun,lisitsyn/shogun,lisitsyn/shogun,sorig/shogun,geektoni/shogun,karlnapf/shogun,karlnapf/shogun,lambday/shogun,sorig/shogun,sorig/shogun,lambday/shogun,sorig/shogun,Saurabh7/shogun,geektoni/shogun,lambday/shogun,besser82/shogun,shogun-toolbox/shogun,geektoni/shogun,Saurabh7/shogun,karlnapf/shogun,Saurabh7/shogun,geektoni/shogun,shogun-toolbox/shogun,besser82/shogun,Saurabh7/shogun,geektoni/shogun,sorig/shogun,shogun-toolbox/shogun,lambday/shogun,Saurabh7/shogun,lisitsyn/shogun,karlnapf/shogun,lambday/shogun