- Moved the build variants descriptions into build_system
- Added Makefile stub into sensors.jd as a starting point
- Small cleanup to build_new_device to reference the PRODUCT_* parameters
- Fixed URL in the README for app engine testing

Conflicts:

	pdk/README
	pdk/docs/guide/build_new_device.jd
	pdk/docs/guide/build_system.jd
	pdk/docs/guide/sensors.jd
diff --git a/pdk/docs/guide/sensors.jd b/pdk/docs/guide/sensors.jd
index 02f0c4e..d41dcd7 100755
--- a/pdk/docs/guide/sensors.jd
+++ b/pdk/docs/guide/sensors.jd
@@ -34,7 +34,8 @@
 <code>libsensors.so</code> so that it will get loaded from <code>/system/lib</code> at runtime. 
 </p>
 
-<p> The following stub <code>Android.mk</code> file ensures that <code>libsensors</code> compiles and links to the appropriate libraries:</p>
+<p> The following stub file, <code>Android.mk</code>, ensures that <code>libsensors</code> compiles and links to the appropriate libraries:</p>
+
 <pre>
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)