Replace low-res 16x16px py.png with 57x57px apple-touch-icon-precomposed.png

Author: hugovk

Diff for: python_docs_theme/layout.html

@@ -2,6 +2,8 @@
 
 {% block rootrellink %}
     <li><img src="{{ pathto('_static/' + theme_root_icon, 1) }}" alt=""
+             width="16px"
+             height="16px"
              style="vertical-align: middle; margin-top: -1px"/></li>
     <li><a href="{{theme_root_url}}">{{theme_root_name}}</a>{{ reldelim1 }}</li>
     {% if theme_root_include_title %}