Create registry_api_client_libraries.md

Signed-off-by: Konrad Kleine <konrad.wilhelm.kleine@gmail.com>

docs/sources/reference/api/registry_api_client_libraries.md

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+page_title: Registry API Client Libraries
+page_description: Various client libraries available to use with the Docker registry API
+page_keywords: API, Docker, index, registry, REST, documentation, clients, C#, Erlang, Go, Groovy, Java, JavaScript, Perl, PHP, Python, Ruby, Rust, Scala
+
+# Docker Registry API Client Libraries
+
+These libraries have not been tested by the Docker Maintainers for
+compatibility. Please file issues with the library owners. If you find
+more library implementations, please list them in Docker doc bugs and we
+will add the libraries here.
+
+
+<table border="1" class="docutils">
+  <colgroup>
+    <col width="24%">
+    <col width="17%">
+    <col width="48%">
+    <col width="11%">
+  </colgroup>
+  <thead valign="bottom">
+    <tr class="row-odd"><th class="head">Language/Framework</th>
+      <th class="head">Name</th>
+      <th class="head">Repository</th>
+      <th class="head">Status</th>
+    </tr>
+  </thead>
+  <tbody valign = "top">
+    <tr class="row-even">
+      <td>JavaScript (AngularJS) <strong>WebUI</strong></td>
+      <td>docker-registry-frontend</td>
+      <td><a class="reference external" href="https://github.com/kwk/docker-registry-frontend">https://github.com/kwk/docker-registry-frontend</a></td>
+      <td>Active</td>
+    </tr>
+  </tbody>
+</table>