Add note about how to submit doc changes to generated module docs, limit TOC…

Add note about how to submit doc changes to generated module docs, limit TOC depth for module category list.

docsite/_themes/srtd/footer.html

@@ -26,5 +26,6 @@
   {%- endif %}
   </p>
 
-  {% trans %}<a href="https://www.github.com/snide/sphinx_rtd_theme">Sphinx theme</a> provided by <a href="http://readthedocs.org">Read the Docs</a>{% endtrans %}
+Ansible docs are generated from <a href="http://github.com/ansible/ansible'>GitHub sources</A> using <A HREF="http://sphinx-doc.org/">Sphinx</A> using a theme provided by <a href="http://readthedocs.org">Read the Docs</a>. {% if pagename.endswith("_module") %}. Module documentation is not edited directly, but is generated from the source code for the modules.  To submit an update to module docs, edit the 'DOCUMENTATION' metadata in the <A HREF="https://github.com/ansible/ansible/tree/devel/library">module source tree</A>. {% endif %}
+
 </footer>

hacking/module_formatter.py

@@ -310,9 +310,10 @@ def main():
     category_list_file.write("============\n")
     category_list_file.write("\n\n")
     category_list_file.write(".. toctree::\n")
+    category_list_file.write("   :maxdepth: 1\n\n")
 
     for category in category_names:
-        category_list_file.write("    list_of_%s_modules\n" % category)
+        category_list_file.write("   list_of_%s_modules\n" % category)
         process_category(category, categories, options, env, template, outputname)
 
     category_list_file.close()