Adding stubs for a new /tech/ (Technical Info) section to replace the
obsolete/outdated /porting/ guide, as well as stubs for its first 3 residents:
Dalvik, Bluetooth, and NFC.

Change-Id: Ie7d375015f630b7087212da55befaac4bcb1d4c2
diff --git a/templates/header b/templates/header
index 823053f..4382545 100644
--- a/templates/header
+++ b/templates/header
@@ -9,6 +9,8 @@
                               onClick="return loadLast('source')"><span>Source</span></a></li>
       <li id="compatibility-link"><a href="/compatibility/index.html"
                               onClick="return loadLast('compatibility')"><span>Compatibility</span></a></li>
+      <li id="tech-link"><a href="/tech/index.html"
+                              onClick="return loadLast('tech')"><span>Tech Info</span></a></li>
       <li id="community-link"><a href="/community/index.html"
                               onClick="return loadLast('community')"><span>Community</span></a></li>
       <li id="about-link"><a href="/about/index.html"