added simple node status legend

lib/legend.js

@@ -0,0 +1,41 @@
+define(function () {
+  return function () {
+    var self = this
+
+    self.render = function (el) {
+      var p = document.createElement("p")
+      p.setAttribute("class", "legend")
+      el.appendChild(p)
+
+      var spanNew = document.createElement("span")
+      spanNew.setAttribute("class", "legend-new")
+      var symbolNew = document.createElement("span")
+      symbolNew.setAttribute("class", "symbol")
+      var textNew = document.createTextNode(" Neuer Knoten.")
+      spanNew.appendChild(symbolNew)
+      spanNew.appendChild(textNew)
+      p.appendChild(spanNew)
+
+      var spanOnline = document.createElement("span")
+      spanOnline.setAttribute("class", "legend-online")
+      var symbolOnline = document.createElement("span")
+      symbolOnline.setAttribute("class", "symbol")
+      var textOnline = document.createTextNode(" Knoten ist online.")
+      spanOnline.appendChild(symbolOnline)
+      spanOnline.appendChild(textOnline)
+      p.appendChild(spanOnline)
+
+      var spanOffline = document.createElement("span")
+      spanOffline.setAttribute("class", "legend-offline")
+      var symbolOffline = document.createElement("span")
+      symbolOffline.setAttribute("class", "symbol")
+      var textOffline = document.createTextNode(" Knoten ist offline.")
+      spanOffline.appendChild(symbolOffline)
+      spanOffline.appendChild(textOffline)
+      p.appendChild(spanOffline)
+    }
+
+    return self
+  }
+})
+