Implemented with ES6 classes, additional functionality.#7

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AnnaYasenova wants to merge 3 commits intoHowProgrammingWorks:masterfrom

AnnaYasenova:master

Commits on Mar 5, 2017

Implemented with ES6 classes, additional functionality.
AnnaYasenova
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Commits on Mar 6, 2017

Variables declared separately.
AnnaYasenova
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Commits on Mar 7, 2017

Condition shorter (52 row), row 92 optimized.
AnnaYasenova
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