Clean notebook#39

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kevinthesun wants to merge 8 commits intodmlc:masterfrom

kevinthesun:CleanNotebook

Commits on Feb 17, 2017

Clean notebooks
Wang
committed
Ignore some cells
Wang
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Remove jupyter generated changes
Wang
committed

Commits on Feb 18, 2017

Fix json format
Wang
committed

Commits on Feb 24, 2017

Ignore cell in linear regression
Wang
committed

Commits on Mar 3, 2017

Add ignore for some cells
Wang
committed

Commits on Mar 16, 2017

Ignore model fit cell in Linear Regression
Wang
committed
Fix liner regression
Wang
committed