Move zip file to the top.

Add R document to the table.
Add stub for REST api.

packaging/index.html

@@ -29,6 +29,12 @@ <h2 align="center">
 <th>Download</th>
 </tr>
 <tr>
+<td align="center">Any</td>
+<td align="center">Zip file</td>
+<td>For Linux users, Hadoop users, or other command-line users on any platform.</td>
+<td align="center"><a href="h2o-SUBST_PROJECT_VERSION.zip">h2o-SUBST_PROJECT_VERSION.zip</a></td>
+</tr>
+<tr>
 <td align="center">Windows (64-bit only)</td>
 <td align="center">Installer package</td>
 <td>For the most user-friendly experience on Windows.</td>
@@ -40,12 +46,6 @@ <h2 align="center">
 <td>For the most user-friendly experience on a Mac.</td>
 <td align="center"><a href="h2o-SUBST_PROJECT_VERSION-osx-installer.dmg">h2o-SUBST_PROJECT_VERSION-osx-installer.dmg</a></td>
 </tr>
-<tr>
-<td align="center">Any</td>
-<td align="center">Zip file</td>
-<td>For Linux users, Hadoop users, or other command-line users on any platform.</td>
-<td align="center"><a href="h2o-SUBST_PROJECT_VERSION.zip">h2o-SUBST_PROJECT_VERSION.zip</a></td>
-</tr>
 </table>
 
 <br>
@@ -67,10 +67,20 @@ <h2 align="center">
 <td align="center"><a href="docs-website/index.html">H2O SUBST_PROJECT_VERSION Documentation</a></td>
 </tr>
 <tr>
+<td align="center">R documentation</td>
+<td>R user documentation available for this version.</td>
+<td align="center"><a href="docs-website/bits/h2oRjoin.pdf">H2O SUBST_PROJECT_VERSION R Package PDF</a></td>
+</tr>
+<tr>
 <td align="center">Javadoc</td>
 <td>Java developer documentation available for this version.</td>
 <td align="center"><a href="javadoc/index.html">H2O SUBST_PROJECT_VERSION Javadoc</a></td>
 </tr>
+<tr>
+<td align="center">REST API documentation</td>
+<td>REST (and JSON) API developer documentation available for this version.</td>
+<td align="center">(Coming soon)</td>
+</tr>
 </table>
 
 </body>