enhance sidebar and content styling

- 3 sidebar variations (margin, no margin, below content)
  depending on screen size
- scrolling sidebar will scroll document (more space on mobile devices)
- wrap map/graph on div.content

lib/sidebar.js

@@ -14,10 +14,6 @@ define([], function () {
       sidebar.classList.toggle("hidden")
     }
 
-    var container = document.createElement("div")
-    container.classList.add("container")
-    sidebar.appendChild(container)
-
     self.getWidth = function () {
       if (sidebar.classList.contains("hidden"))
           return 0
@@ -27,10 +23,10 @@ define([], function () {
     }
 
     self.add = function (d) {
-      d.render(container)
+      d.render(sidebar)
     }
 
-    self.container = container
+    self.container = sidebar
 
     return self
   }