docs: misc changes to sdk setup docs
update sdk manager screenshot;
update info about new manager UI;
more info about the windows installer;

Change-Id: Ic4a582ba28f02e2c787901a575194ae884be396e
diff --git a/docs/html/sdk/index.jd b/docs/html/sdk/index.jd
index 3dda5ee..8b77303 100644
--- a/docs/html/sdk/index.jd
+++ b/docs/html/sdk/index.jd
@@ -23,7 +23,8 @@
 
 <ol>
   <li>Prepare your development computer and ensure it meets the system requirements.</li>
-  <li>Install the SDK starter package from the table above.</li>
+  <li>Install the SDK starter package from the table above. (If you're on Windows, download the
+installer for help with the initial setup.)</li>
   <li>Install the ADT Plugin for Eclipse (if you'll be developing in Eclipse).</li>
   <li>Add Android platforms and other components to your SDK.</li>
   <li>Explore the contents of the Android SDK (optional).</li>