Added introductory tables to Chrome apps APIs.

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

Index: chrome/common/extensions/docs/templates/intros/webstore.html
diff --git a/chrome/common/extensions/docs/templates/intros/webstore.html b/chrome/common/extensions/docs/templates/intros/webstore.html
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+<table class="intro">
+  <tr>
+    <th scope="col"></th>
+    <th scope="col"></th>
+  </tr>
+  <tr>
+    <td><strong>Description:</strong></td>
+    <td>Use the <code>chrome.webstore</code> module
+    to initiate app and extension installations "inline" from your site.</td>
+  </tr>
+  <tr>
+    <td><strong>Availability:</strong></td>
+    <td>Google Chrome 15</td>
+  </tr>
+  <tr>
+    <td><strong>Permissions:</strong></td>
+    <td>None</td>
+  </tr>
+  <tr>
+    <td><strong>Learn more:</strong></td>
+    <td><a href="https://developers.google.com/chrome/web-store/docs/inline_installation">Using Inline Installation</a></td>
+  </tr>
+</table>