adds minor style updates

_includes/header.html

@@ -3,8 +3,8 @@
   <div class="wrapper">
 
     <a class="site-title" href="{{ site.baseurl }}/">{{ site.title }}</a>
-    <img src="{% link assets/bird-icon.png %}" alt="bird icon"
-         style="height:40px; padding: 5px 0 0 10px;" />
+    <img src="{% link assets/elements/icon_do.svg %}" alt="do-ocracy icon"
+         style="height:40px; padding: 5px 0 0 20px;" />
 
     <nav class="site-nav">
       <a href="#" class="menu-icon">

_sass/_base.scss

@@ -41,7 +41,12 @@ ul, ol, dl, figure,
     margin-bottom: $spacing-unit / 2;
 }
 
-
+hr {
+    border-color: $grey-color-light;
+    border-style: solid;
+    border-width: 1px 0 0;
+    margin: $spacing-unit - 1px 0 $spacing-unit;
+}
 
 /**
  * Images