Document new badge

Signed-off-by: Michal Čihař <michal@cihar.com>

docs/devel/index.rst

@@ -25,6 +25,12 @@ share information about translation using Facebook or Twitter. All these
 possibilities can be found on :guilabel:`Share` tab. Example of status badges
 for Weblate itself are show below.
 
+Shields.IO badge often used to quickly see status of a project:
+
+.. image:: ../images/weblate-shields-badge.svg
+    :alt: Translation status
+    :target: http://l10n.cihar.com/engage/weblate/?utm_source=widget
+
 Small badge often used to quickly see status of a project:
 
 .. image:: ../images/weblate-status-badge.png

docs/images/weblate-shields-badge.svg

+<svg xmlns="http://www.w3.org/2000/svg" width="103" height="18"><linearGradient id="a" x2="0" y2="100%"><stop offset="0" stop-color="#fff" stop-opacity=".7"/><stop offset=".1" stop-color="#aaa" stop-opacity=".1"/><stop offset=".9" stop-opacity=".3"/><stop offset="1" stop-opacity=".5"/></linearGradient><rect rx="4" width="103" height="18" fill="#555"/><rect rx="4" x="67" width="36" height="18" fill="#e05d44"/><path fill="#e05d44" d="M67 0h4v18h-4z"/><rect rx="4" width="103" height="18" fill="url(#a)"/><g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11"><text x="34.5" y="13" fill="#010101" fill-opacity=".3">translated</text><text x="34.5" y="12">translated</text><text x="84" y="13" fill="#010101" fill-opacity=".3">62%</text><text x="84" y="12">62%</text></g></svg>
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