Add intro to any Chrome app API that has nothing in place already.

chrome/common/extensions/docs/templates/intros/app_window.html

Index: chrome/common/extensions/docs/templates/intros/app_window.html
diff --git a/chrome/common/extensions/docs/templates/intros/app_window.html b/chrome/common/extensions/docs/templates/intros/app_window.html
new file mode 100644
index 0000000000000000000000000000000000000000..8bf15c5aa502cfb6f3522dbd238d7d53467e762e
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+++ b/chrome/common/extensions/docs/templates/intros/app_window.html
@@ -0,0 +1,15 @@
+<p id="classSummary">
+Use the <code>chrome.app.window</code> module
+to create windows.
+Windows can either be shells or panels.
+Shell windows have no browser chrome.
+Panel windows are the same as shell windows,
+except they have different size and position restrictions,
+for example, a chat panel.
+</p>
+
+<h4>Related Documentation</h4>
+<ul>
+	<li><a href="about_apps.html#look">"How they look"</a></li>

[saroop, 2012/11/20 22:17:30]

Should "How they look" be within quotes?

[mkearney1, 2012/11/20 22:27:11]

Done.

+	<li><a href="app_lifecycle.html">Manage App Lifecycle</a></li>
+</ul>