Merge branch 'feature-local-logo' into 'master'

Feature local logo

```bash
mkdir -p ~/site-circle/static
wget -O ~/site-circle/static/local-logo.png https://www.vik.bme.hu/static/img/default/logo.png
```

See merge request !229

circle/dashboard/templates/branding.html

+<img src="{{ STATIC_URL}}dashboard/img/logo.png" style="height: 25px;"/>
+<img src="{{ STATIC_URL}}local-logo.png" style="padding-left: 2px; height: 25px;"/>

circle/dashboard/templates/dashboard/base.html

@@ -13,7 +13,7 @@
 
 
 {% block navbar-brand %}
 {% block navbar-brand %}
   <a class="navbar-brand" href="{% url "dashboard.index" %}" style="padding: 10px 15px;">
   <a class="navbar-brand" href="{% url "dashboard.index" %}" style="padding: 10px 15px;">
-    <img src="{{ STATIC_URL}}dashboard/img/logo.png" style="height: 25px;"/>
+    {% include "branding.html" %}
   </a>
   </a>
 {% endblock %}
 {% endblock %}