#1295 Adding note support to state diagrams

src/themes/state.scss

@@ -98,4 +98,21 @@ g.stateGroup line {
 .statediagram-cluster .inner {
   rx:0;
   ry:0;
-}
+}
+
+.statediagram-state rect {
+  rx: 5px;
+  ry: 5px;
+}
+
+.note-edge {
+  stroke-dasharray: 5;
+}
+
+.statediagram-note rect {
+  fill: $noteBkgColor;
+  stroke: $noteBorderColor;
+  stroke-width: 1px;
+  rx: 0;
+  ry: 0;
+}