WIP: Cards build optimization

lib/cards/markdown_card.dart

@@ -0,0 +1,31 @@
+part of '../main.dart';
+
+class MarkdownCard extends StatelessWidget {
+  final HACard card;
+
+  const MarkdownCard({Key key, this.card}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    if (card.content == null) {
+      return Container(height: 0.0, width: 0.0,);
+    }
+    return CardWrapper(
+        child: Padding(
+          padding: EdgeInsets.fromLTRB(Sizes.leftWidgetPadding, Sizes.rowPadding, Sizes.rightWidgetPadding, Sizes.rowPadding),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: <Widget>[
+              CardHeader(name: card.name),
+              MarkdownBody(
+                data: card.content,
+              )
+            ],
+          ),
+        )
+    );
+  }
+
+  
+}