BinaryTree find(int key) fix#113

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dynamitechetan merged 2 commits intoTheAlgorithms:masterfrom

mpokryva:node-find-fix

Oct 2, 2017

Commits on Sep 29, 2017

Changed find(int key) method to return null when node is not found, and updated docs accordingly. Issue #104.
mpokryva
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Merge branch 'master' of https://github.com/TheAlgorithms/Java into node-find-fix
mpokryva
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