Make homepage more compliant with ASF recommendations

Fix few issues pointed by whimsy.apache.org/site/project/mynewt.
diff --git a/custom-theme/css/custom.css b/custom-theme/css/custom.css
index b673f3b..4d6f8bd 100644
--- a/custom-theme/css/custom.css
+++ b/custom-theme/css/custom.css
@@ -474,3 +474,15 @@
 .fa-github, .icon-github:before {
     content: "";
 }
+
+.button-footer-asf {
+  background-color: transparent;
+  border-radius: 5px;
+  border: 1px solid grey;
+  color: black;
+  padding: 2px 20px;
+  text-align: center;
+  text-decoration: none;
+  display: inline-block;
+  font-size: 12px;
+}
diff --git a/custom-theme/footer.html b/custom-theme/footer.html
index 0c00d88..498b045 100644
--- a/custom-theme/footer.html
+++ b/custom-theme/footer.html
@@ -6,15 +6,45 @@
     </div>
     <div class="col-xs-12">
         <div class="logos">
-            <img src="/img/asf_logo_wide_small.png" alt="Apache" title="Apache">
-            <small class="footnote">
-                Apache Mynewt, Mynewt, Apache, the Apache feather logo, and the Apache Mynewt
-                project logo are either registered trademarks or trademarks of the Apache
-                Software Foundation in the United States and other countries.
-            </small>
+            <a href="https://www.apache.org/">
+                <img src="/img/asf_logo_wide_small.png" alt="Apache" title="Apache">
+            </a>
+            <p>
+                Copyright © 2015-2021 The Apache Software Foundation.<br>
+                <small class="footnote">
+                    Apache Mynewt, Mynewt, Apache, the Apache feather logo, and the Apache Mynewt
+                    project logo are either registered trademarks or trademarks of the Apache
+                    Software Foundation in the United States and other countries.
+                </small>
+            </p>
             <a href="{{ config.extra.slack_url }}">
                 <img src="https://www.countit.com/images/add_to_slack.png" alt="Slack Icon" title="Join our Slack Community" />
             </a>
         </div>
     </div>
+    <a href="https://www.apache.org/licenses/">
+        <button class="button-footer-asf">
+            License
+        </button>
+    </a>
+    <a href="https://www.apache.org/foundation/sponsorship.html">
+        <button class="button-footer-asf">
+            Sponsorship
+        </button>
+    </a>
+    <a href="https://www.apache.org/foundation/thanks.html">
+        <button class="button-footer-asf">
+            Thanks
+        </button>
+    </a>
+    <a href="https://www.apache.org/security/">
+        <button class="button-footer-asf">
+            Security
+        </button>
+    </a>
+    <a href="https://apache.org/events/current-event">
+        <button class="button-footer-asf">
+            ASF Events
+        </button>
+    </a>
 </footer>
diff --git a/custom-theme/main.html b/custom-theme/main.html
index c685c3b..0de4ec5 100644
--- a/custom-theme/main.html
+++ b/custom-theme/main.html
@@ -62,7 +62,7 @@
 
         {% include "nav.html" %}
 
-        {% set full_width_page_titles = [None, 'Quick Start', 'About', 'Talks', 'Documentation', 'Download', 'Community', 'Events'] %}
+        {% set full_width_page_titles = [None, 'Home', 'Quick Start', 'About', 'Talks', 'Documentation', 'Download', 'Community', 'Events'] %}
 
         <div class="container">
             {% if page.title == 'Home' %}