Compiles on Swift 2.3 Xcode 8.0#19

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omar314 wants to merge 5 commits intoartemkrachulov:masterfrom

Commits on Sep 14, 2016

Changed protocols' access level.
Omar Gonzalez
committed
Changed maskStatus' access level to public.
Omar Gonzalez
committed
removed some warnings.
Omar Gonzalez
committed
Restored inout declaration, but it is now in the proper place.
Omar Gonzalez
committed
Xcode is strange ...
Omar Gonzalez
committed