Update docs with new API information.

Author: harishreedharan

docs/monitoring.md

@@ -228,6 +228,14 @@ for a running application, at `http://localhost:4040/api/v1`.
     <td><code>/applications/[app-id]/storage/rdd/[rdd-id]</code></td>
     <td>Details for the storage status of a given RDD</td>
   </tr>
+  <tr>
+    <td><code>/applications/[app-id]/logs</code></td>
+    <td>Download the event logs for all attempts of the given application as a zip file</td>
+  </tr>
+  <tr>
+    <td><code>/applications/[app-id]/[attempt-id/logs</code></td>
+    <td>Download the event logs for the specified attempt of the given application as a zip file</td>
+  </tr>
 </table>
 
 When running on Yarn, each application has multiple attempts, so `[app-id]` is actually