Slight css changes to deal with trickle

Hi Aniket,
I added a 5px padding bottom to flip-card for when dealing with 'trickle' otherwise the flipcard is obscured by the continue bar (perhaps even 1px would do) and added an overflow hidden to deal with images too big.
Just added as a stop gap for some demos but until look at making the component more responsive, i.e. not a fixed size., its a good enough simple fix?