Adds node-shapes to the canvas

- circle
- rect (w/ radius)
- fluffy cloud shape
- hexagons
- stacks

client/app/scripts/charts/node-shape-stack.js

@@ -0,0 +1,19 @@
+import React from 'react';
+import _ from 'lodash';
+
+export default function NodeShapeCircleStack(props) {
+  const propsNoHighlight = _.clone(props);
+  const Shape = props.shape;
+  delete propsNoHighlight.highlighted;
+  return (
+    <g className="stack">
+      <g transform="translate(0, 4)">
+        <Shape {...propsNoHighlight} />
+      </g>
+      <Shape {...props} />
+      <g transform="translate(0, -4)">
+        <Shape {...propsNoHighlight} />
+      </g>
+    </g>
+  );
+}