Added doctest for flippable images with different sizes.

lib/flippable.html

@@ -64,16 +64,27 @@
         <script class="doctest">
             let scatterContainer = new DOMScatterContainer(main, { stopEvents: false })
             if (Capabilities.supportsTemplate()) {
-                let flip = new DOMFlip(
+                let flip1 = new DOMFlip(
                     scatterContainer,
                     flipTemplate,
                     new ImageLoader('./examples/king.jpeg'),
                     new ImageLoader('./examples/women.jpeg'),
-                    { tapDelegateFactory: CardWrapper, preloadBack: true }
+                    { /*tapDelegateFactory: CardWrapper,*/ preloadBack: true }
                 )
-                flip.load().then((flip) => {
+                flip1.load().then((flip) => {
                     flip.centerAt({ x: 150, y: 120 })
                 })
+
+                let flip2 = new DOMFlip(
+                    scatterContainer,
+                    flipTemplate,
+                    new ImageLoader('./examples/king.jpeg'),
+                    new ImageLoader('./examples/queen.jpeg'),
+                    { /*tapDelegateFactory: CardWrapper,*/ preloadBack: true }
+                )
+                flip2.load().then((flip) => {
+                    flip.centerAt({ x: 650, y: 120 })
+                })
             } else {
                 alert('Templates not supported, use Edge, Chrome, Safari or Firefox.')
             }