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obsolete/outdated /porting/ guide, as well as stubs for its first 3 residents: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/bluetooth/index.md b/src/tech/bluetooth/index.md
new file mode 100644
index 0000000..2f5d459
--- /dev/null
+++ b/src/tech/bluetooth/index.md
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+<!--
+   Copyright 2011 The Android Open Source Project 
+
+   Licensed under the Apache License, Version 2.0 (the "License"); 
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+-->
+
+# Bluetooth Technical Information #
+*Placeholder*
+
+The Android Open-Source Project includes a bluetooth subsystem currently based
+on the upstream bluez project. Android then layers various IPC and similar
+libraries to link the bluez library with the Android Bluetooth stack and API.
+
diff --git a/src/tech/bluetooth/sidebar.md b/src/tech/bluetooth/sidebar.md
new file mode 100644
index 0000000..32ca4a9
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+++ b/src/tech/bluetooth/sidebar.md
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+# Topics #
+- [Dalvik](/tech/dalvik/index.html)
+- [Bluetooth](/tech/bluetooth/index.html)
+- [NFC](/tech/nfc/index.html)
+
+# Bluetooth Topics #