List engine-api in the client libraries reference.

Signed-off-by: David Calavera <david.calavera@gmail.com>

docs/reference/api/remote_api_client_libraries.md

@@ -55,6 +55,12 @@ will add the libraries here.
       <td><a class="reference external" href="https://github.com/bwu-dart/bwu_docker">https://github.com/bwu-dart/bwu_docker</a></td>
       <td>Active</td>
     </tr>
+    <tr>
+      <td>Go</td>
+      <td>engine-api</td>
+      <td><a class="reference external" href="https://github.com/docker/engine-api">https://github.com/docker/engine-api</a></td>
+      <td>Active</td>
+    </tr>
     <tr>
       <td>Go</td>
       <td>go-dockerclient</td>