feat: navbar logo image, Home link, active-state per route

templates/partials/navbar.html

@@ -8,11 +8,16 @@
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
       </button>
-      <a class="navbar-brand" href="/">{{ config.title }}</a>
+      <a class="navbar-brand" href="/">
+        <img src="/images/logo.png" alt="{{ config.title }}">
+      </a>
     </div>
 
     <div class="collapse navbar-collapse" id="navbar-collapse-1">
-      <ul class="nav navbar-nav navbar-right">
+      <ul class="nav navbar-nav navbar-right main-nav">
+        <li class="{% if current_path == '/' %}active{% endif %}">
+          <a href="/">Home</a>
+        </li>
         {% set top = get_section(path="_index.md") %}
         {%- for p in top.subsections -%}
           {%- set sub = get_section(path=p) -%}