Changes

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* https://pengqu.wordpress.com/2018/11/21/codacy-houndci/

* https://pengqu.wordpress.com/2018/12/11/release-4-0-cpp-practice/

* https://pengqu.wordpress.com/2018/12/11/release-4-0-about-notepad/

* https://github.com/Peng-Qu/SenecaBlackboardExtension/pull/2

* https://github.com/hdb30/cpp-practice/pull/1

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