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obsolete/outdated /porting/ guide, as well as stubs for its first 3 residents: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/src/tech/nfc/sidebar.md b/src/tech/nfc/sidebar.md
new file mode 100644
index 0000000..356d531
--- /dev/null
+++ b/src/tech/nfc/sidebar.md
@@ -0,0 +1,6 @@
+# Topics #
+- [Dalvik](/tech/dalvik/index.html)
+- [Bluetooth](/tech/bluetooth/index.html)
+- [NFC](/tech/nfc/index.html)
+
+# NFC Topics #