Added option.maxTries#184

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Aleksandras-Novikovas wants to merge 4 commits intocoopernurse:masterfrom

Aleksandras-Novikovas:master

Commits on Feb 11, 2018

Commits on May 13, 2018

Readded _failedTries incrementatiion (disapeared in last commit).
Aleksandras-Novikovas
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