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()