Added ability to show both faces of the card at the same time.
This is basically a copy of https://github.com/kenkeiter/skeuocard/commit/a40ece635c70a6a7a6abdfb392d46b1dbd3f3209#diff-0 with the compiled changes included.
Since skeuocard basically works only for IE10+ we almost always have to provide a good no-js alternative. In order to style the inputs we will often include them in divs or other containers which will be removed by the initialisation JS. Thanks @leek for the fix.
Refs #103 #101
Fixes #108
Merge pull request #1 from cvrabie/master

adding ability to show both faces