euscanwww: Watched herds/maintainers/categories panel

* Refactored templates and templatetags
* Added unfavourite views
* Added button to favourite/unfavourite package
* Panel for showing favourited objects

Signed-off-by: volpino <fox91@anche.no>

euscanwww/djeuscan/templates/euscan/accounts/herds.html

@@ -1,11 +1,14 @@
-{% extends "_base.html" %}
+{% extends "euscan/_datatable.html" %}
 {% load url from future %}
+{% load euscan %}
 
 {% block title %}
-  {{ block.super }} - My herds
+  {{ block.super }} - Watched herds
 {% endblock %}
 
 
 {% block content %}
-  <h2>Welcome {{ user }}</h2>
+  <h2>Watched herds</h2>
+
+  {% herds_table herds %}
 {% endblock %}