update branding

* add incubation disclaimer to all pages
* add (incubating) to first occurrence of "Apache AsterixDB" on every page
* add (tm) to the logo and to "Apache AsterixDB"
* add required links to www.apache.org
* also ordered committers alphabetically (not a requirement ...)

Change-Id: I645e5b3474de203ee62e9c0cf34317d02722bc69
Reviewed-on: https://asterix-gerrit.ics.uci.edu/717
Reviewed-by: Ian Maxon <imaxon@apache.org>
diff --git a/_includes/nav_header.html b/_includes/nav_header.html
index 28db61c..f3b5754 100644
--- a/_includes/nav_header.html
+++ b/_includes/nav_header.html
@@ -1,10 +1,12 @@
-<div class="masthead">
-    <p class="lead">
-        <a href="{{ site.url }}index.html"><img src="{{ site.url }}img/asterixdb.png" style="height:75px; width:auto; vertical-align:bottom; margin-top:10px;"/></a>
-    </p>
-</div>
+      <div class="masthead">
+        <p class="lead">
+           <a href="index.html">
+             <img src="img/asterixdb_tm.png" style="height:75px; width:auto; vertical-align:bottom; margin-top:10px;"/>
+           </a>
+        </p>
+      </div>
 
-<nav class="navbar navbar-default">
+      <nav class="navbar navbar-default">
         <div class="container">
           <div class="navbar-header">
             <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navbar-collapse">
@@ -42,6 +44,21 @@
                 </ul>
               </li>
             </ul>
+            <ul class="nav navbar-nav navbar-right">
+              <li class="dropdown">
+                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false"
+                   style="padding-right: 30px">
+                  <img src="img/feather.png" style="height:20px"/>Apache Software Foundation<span class="caret"/>
+                </a>
+                <ul class="dropdown-menu dropdown-menu-right" role="menu">
+                  <li><a href="http://www.apache.org/"><b>ASF Homepage</b></a></li>
+                  <li><a href="http://www.apache.org/licenses/">License</a></li>
+                  <li><a href="http://www.apache.org/foundation/sponsorship.html">Donate</a></li>
+                  <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+                  <li><a href="http://www.apache.org/security/">Security</a></li>
+                </ul>
+              </li>
+            </ul>
           </div><!--/.nav-collapse -->
         </div>
       </nav>