FrenkyNet/Flysystem — pull request #56 by 4d47 (2014-01-12 21:39:38+00:00)
Title: Remove abstract on Util class

I think Util should not be declared abstract, it's really a concrete class.
Forbid instanciation excplicitly with a private constructor instead.
Oh well, maybe this is too picky for nothing but I think it makes more OOP sense