Rebase templates, add breadcrumbs

affiliates/templates/affiliates/affiliatejournal_detail.html

-{% extends 'scipost/base.html' %}
+{% extends 'affiliates/base.html' %}
 
 {% block pagetitle %}: Affiliate Journal: {{ object }}{% endblock %}
 
+{% block breadcrumb_items %}
+  <span class="breadcrumb-item">Affiliates</span>
+  <span class="breadcrumb-item">Journals</span>
+  <span class="breadcrumb-item">{{ object }}</span>
+{% endblock %}
+
 {% block content %}
 
   <h2 class="highlight">Affiliate Journal: {{ object }}</h2>

affiliates/templates/affiliates/affiliatejournal_list.html

-{% extends 'scipost/base.html' %}
+{% extends 'affiliates/base.html' %}
 
 {% block pagetitle %}: Affiliate Journals{% endblock %}
 
+{% block breadcrumb_items %}
+  <span class="breadcrumb-item">Affiliates</span>
+  <span class="breadcrumb-item">Journals</span>
+{% endblock %}
+
 {% block content %}
 
   <h2 class="highlight">Affiliate Journals</h2>

affiliates/templates/affiliates/affiliatepublication_detail.html

-{% extends 'scipost/base.html' %}
+{% extends 'affiliates/base.html' %}
 
 {% block pagetitle %}: Publication: {{ object }}{% endblock %}
 
+{% block breadcrumb_items %}
+  <span class="breadcrumb-item">Affiliates</span>
+  <span class="breadcrumb-item">
+    <a href="{% url 'affiliates:journals' %}">Journals</a>
+  </span>
+  <span class="breadcrumb-item">
+    <a href="{{ object.journal.get_absolute_url }}">{{ object.journal }}</a>
+  </span>
+  <span class="breadcrumb-item">{{ object }}</span>
+{% endblock %}
 {% block content %}
 
   <h2 class="highlight">Publication: {{ object }} </h2>

affiliates/templates/affiliates/base.html

+{% extends 'scipost/base.html' %}
+
+{% block breadcrumb %}
+  <div class="breadcrumb-container">
+    <div class="container">
+      <nav class="breadcrumb hidden-sm-down">
+        {% block breadcrumb_items %}
+          <span class="breadcrumb-item">Affiliates</span>
+        {% endblock %}
+      </nav>
+    </div>
+  </div>
+{% endblock %}