Add car rendering

Also split dynamic objects into a separate canvas for faster rendering

style.css

@@ -164,6 +164,12 @@ a:visited{
     background: linear-gradient(#444, #333);
 }
 
+#mapCanvas, #dynCanvas{
+    position: fixed;
+    width:100%;
+    height:100%;
+}
+
 .colorKey, .gradientKey{
     border:1px #858585 solid;
     border-radius: 4px;