Add archive link and remove schedule link from main navigation

closes #315

Author: AndrewKvalheim

_config.yml

@@ -37,9 +37,13 @@ collections:
 
 defaults:
     - scope: { type: archive-conferences }
-      values: { layout: archive/conference }
+      values:
+        layout: archive/conference
+        nav: archive
     - scope: { type: archive-sessions }
-      values: { layout: archive/session }
+      values:
+        layout: archive/session
+        nav: archive
     - scope: { type: sponsor-years }
       values:
         body_id: sponsors

_includes/header.html

@@ -16,12 +16,12 @@
   <div id="main-nav-container" class="collapse navbar-collapse top-nav-collapse">
     <ul class="nav pull-left navbar-nav main-nav-links inline-list">
       <li {% if page.nav == "home" %} class="active" | {% endif %} ><a href="/">Home</a></li>
-      <li><a href="{{ site.custom.url.schedule }}">{{ site.custom.year }} Schedule</a></li>
+      <li {% if page.nav == "get_involved" %} class="active" | {% endif %} ><a href="/get_involved.html">Get Involved</a></li>
     </ul>
 
     <ul class="nav pull-right navbar-nav main-nav-links inline-list">
-      <li {% if page.nav == "get_involved" %} class="active" | {% endif %} ><a href="/get_involved.html">Get Involved</a></li>
       <li {% if page.nav == "sponsors" %} class="active" | {% endif %} ><a href="{{ sponsor_year.url }}">Sponsors</a></li>
+      <li {% if page.nav == "archive" %} class="active" | {% endif %} ><a href="/archive">Archive</a></li>
     </ul>
   </div><!-- /.navbar-collapse -->
 </nav>

archive.html

@@ -1,5 +1,6 @@
 ---
 layout: page
+nav: archive
 title: Archive
 redirect_from:
  - /schedule/