make main page a little bit nicer

pdb-js/src/assets/img/scatter-chart3.svg

@@ -0,0 +1,23 @@
+<svg 
+    width="64"
+    height="64"
+    xmlns="http://www.w3.org/2000/svg"
+    xmlns:xlink="http://www.w3.org/1999/xlink">
+	<defs>
+		<g id="cross">
+			<rect x="4" y="0" width="4" height="12" style="fill: #0051c2;" />
+			<rect x="0" y="4" width="12" height="4" style="fill: #0051c2;" />
+		</g>
+	</defs>
+
+	<use x="12" y="10" xlink:href="#cross"  />
+	<use x="30" y="6" xlink:href="#cross"  />
+	<use x="26" y="32" xlink:href="#cross"  />
+	<use x="12" y="38" xlink:href="#cross"  />
+	<use x="44" y="20" xlink:href="#cross"  />
+
+	<path d="M4,0
+	         L4,60
+	         L64,60"
+	      style="stroke:black; stroke-width: 6px; fill:none;"/>
+</svg>