Adjust frame calculations to support negative minimumLineSpacing.#31

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J-Rojas wants to merge 2 commits intokeighl:masterfrom

Commits on Dec 21, 2016

Adjust frame calculations to support negative minimumLineSpacing.
J-Rojas
committed

Commits on Jan 6, 2017

Fix divide by zero crash on iOS 9.x when animating collection cells from offscreen positions
J-Rojas
committed