assets: gather theme images in assets/images/theme/

_includes/footer

@@ -11,15 +11,15 @@
                         justify-content:  flex-start;
                     ">
                     {% if site.youtube %}
-                    <a href={{site.youtube}} style="padding-right:20px;"><img src = "{{ site.baseurl }}/youtube.svg" style="max-width: 61px; margin: 7px 7px 0 1px; opacity: 0.8;"/></a>
+                      <a href={{site.youtube}} style="padding-right:20px;"><img src="{{ site.baseurl }}/assets/images/theme/youtube.svg" style="max-width: 61px; margin: 7px 7px 0 1px; opacity: 0.8;" /></a>
                     {% endif %}
 
                     {% if site.facebook %}
-                    <a href={{site.facebook}} style="padding-right:20px;">{% include image src="general/facebook.png" sizes="(min-width: 1180px) 100px, (min-width: 980px) 100px, (min-width: 740px) 100px, 100px"  style="max-width:97px; margin: 7px 7px 0 1px; opacity: 0.8;" %}</a>
+                      <a href={{site.facebook}} style="padding-right:20px;"><img src="{{ site.baseurl }}/assets/images/theme/facebook.png" style="max-width:97px; margin: 7px 7px 0 1px; opacity: 0.8;" /></a>
                     {% endif %}
 
                     {% if site.twitter %}
-                    <a href={{site.twitter}} style="padding-right:20px;">{% include image src="general/twitter.png" sizes="(min-width: 1180px) 100px, (min-width: 980px) 100px, (min-width: 740px) 100px, 100px"  style="max-width: 54px; margin: 7px 60px 0 -8px; opacity: 0.8;" %}</a>
+                      <a href={{site.twitter}} style="padding-right:20px;"><img src="{{ site.baseurl }}/assets/images/theme/twitter.png" style="max-width: 54px; margin: 7px 60px 0 -8px; opacity: 0.8;" /></a>
                     {% endif %}
                 </div>
             </div>

_layouts/base.html

@@ -45,9 +45,9 @@
     <header role="banner" class="page-header">
         <div class="page-header__logo">
             <a class="page-header__logo-link" title="Zur Startseite" href="http://www.uni-wuerzburg.de/startseite/">
-                <img src="{{ site.baseurl }}/assets/images/uni-wuerzburg-logo.svg" class="page-header__logo-full">
+                <img src="{{ site.baseurl }}/assets/images/theme/uni-wuerzburg-logo.svg" class="page-header__logo-full">
             </a>
-            <img src="{{ site.baseurl }}/assets/images/uni-wuerzburg-header-background.png" class="page-header__logo-background">
+            <img src="{{ site.baseurl }}/assets/images/theme/uni-wuerzburg-header-background.png" class="page-header__logo-background">
         </div>
     </header>