added Relay to tiles

resources/css/style.css

@@ -57,6 +57,10 @@ svg rect{
 	stroke:rgb(0,0,0);
 }
 
+svg.Relay rect{
+	fill: white;
+}
+
 svg.locked polygon,
 svg.locked rect:not(.sig_a):not(.sig_b){
 	fill:lime;

resources/svg/Relay.svg

@@ -0,0 +1,4 @@
+<svg width="100" height="100" viewbox="0 0 %width% 100">
+	<rect x="10" y="10" width="80" height="80" />
+	<text x="25" y="65" >%text%</text>
+</svg>