Add display method with message, duration and completion block#89

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Ptitematil2 wants to merge 2 commits intocezarywojcik:masterfrom Ptitematil2:master

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Commits on Jul 4, 2016

Add display method with message, duration and completion block
Ptitematil2
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Commits on Nov 15, 2016

Fixing error for xcode8 compilation
Ptitematil2
committed