Fixes source images and removes sources from navigation.

Addressing cross-browser problems in how source images are displayed.
However, also removing the sources pages from navigation.
Not especially useful in how we're currently using it.
Not completely removed as might be worth revisiting if we start hosting data
from other sources.

_config.yml

@@ -19,9 +19,7 @@ schema: default
 navigation:
   - title: Datasets
     url: /datasets/
-  - title: Sources
-    url: /sources/
-
+
 # Collections
 collections:
   datasets:

sources.html

@@ -10,15 +10,13 @@
 {% for organization in site.organizations %}
   {% assign dataset_count = site.datasets | where:"organization", organization.title | size %}
   <div class="media">
-    <div class="media-left">
-      {% if organization.logo and organization.logo != empty %}
+
+    <div class="media-body">
+      <h4 class="media-heading">      {% if organization.logo and organization.logo != empty %}
         <a href="{{ site.baseurl }}{{ organization.url }}" class="organization-thumbnail">
           <img class="media-object" src="{{ organization.logo }}" alt="{{ organization.title }}">
         </a>
-      {% endif %}
-    </div>
-    <div class="media-body">
-      <h4 class="media-heading"><a href="{{ site.baseurl }}{{ organization.url }}">{{ organization.title }}</a></h4>
+      {% endif %}<a href="{{ site.baseurl }}{{ organization.url }}">{{ organization.title }}</a></h4>
       <p>{{ organization.description }}</p>
       <p><a href="{{ site.baseurl }}/datasets/?organization={{ organization.title | slugify }}">{{ dataset_count }} datasets</a></p>
     </div>