[Feature]: Snap the card view to top or bottom automatically#2

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Badrmoh wants to merge 2 commits intobrianadvent:masterfrom

Commits on Dec 30, 2018

[Feature]: Snap the card view to top or bottom according to velocity of the pan gesture and to what extend the card has been dragged.
Badrmoh
committed

Commits on Dec 31, 2018

Used "isReversed" property instead of handling the reverse animation manually.
Badrmoh
committed