make nav title smaller and configurable

layouts/partials/nav-bar.html

@@ -1,5 +1,5 @@
 <nav class="nav-bar side-padding">
-  <h1 class="nav-header"><a href="/" class="nav-text">mdd</a></h1>
+  <h1 class="nav-header"><a href="/" class="nav-text">{{ $.Site.Params.navtitle }}</a></h1>
   <div class="hamburger-menu">
 		<input type="checkbox" onclick="hamburgerMenuPressed()"/>
 		<span></span>

static/css/style.css

@@ -34,6 +34,7 @@ strong {
 .nav-text {
     text-decoration: none;
     z-index: 105;
+    font-size: 0.8em;
 }
 .hamburger-menu {
     display: block;
@@ -290,6 +291,7 @@ h1, h2, h3, h4, h5, h6 {
 img {
     width: 100%;
     height: auto;
+    margin: 1em 0;
 }
 blockquote {
     border-left: 0.3em solid #D1D1D1;