implements first attempt of unlocated bars

needs profiling and better calculated styles

src/components/presentational/Timeline/DatetimeBar.js

@@ -0,0 +1,21 @@
+import React from 'react'
+
+export default ({
+  category,
+  events,
+  x,
+  y,
+  onSelect,
+  styleProps,
+  extraRender
+}) => (
+    <rect
+      onClick={onSelect}
+      className='event'
+      x={x}
+      y={y}
+      style={styleProps}
+      width={4}
+      height={55}
+    />
+)