Cleaning up source.android.com files.

This change fixes some formatting artifacts that resulted from the export from
Sites, and also updates links to no longer point to Sites and use the standard
{@docRoot} idiom. Also contains a few content updates, and introduces a page
about branch management.
diff --git a/pdk/docs/porting/bluetooth.jd b/pdk/docs/porting/bluetooth.jd
index e974982..ceb8683 100755
--- a/pdk/docs/porting/bluetooth.jd
+++ b/pdk/docs/porting/bluetooth.jd
@@ -170,7 +170,7 @@
 
 <p><strong>Development Notes</strong></p>
 <ul>
-  <li><strong>HID Support<br />
+  <li><strong>HID Support <br />
   </strong>Cupcake features some early work&#151;Bluez has an HID plugin, <code>external/bluez/utils/input/Android.mk</code>, which gets compiled. <br />
     <br />
 You can interact directly with this plugin using <code>dbus-send</code></span> and <code>dbus-monitor</code>. While not officially supported, you should be able to connect and use a HID keyboard and mouse using the Bluez HID plugin API. Next steps include plumbing the plugin API in the Android Java framework and offering better support for HID input methods (new keymaps and mouse support).<br />