Add AJAX filtering of company list

- Search across NAME and DESCRIPTION fields
- TODO - Implement pagination (how?)

InvenTree/templates/base.html

@@ -16,12 +16,19 @@
 <!-- Local stylesheet -->
 <link rel="stylesheet" href="{% static 'css/inventree.css' %}">
 
+<!-- AJAX -->
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
+
 <!-- Bootstrap javascript -->
 <!--
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
 <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
 -->
 
+{% block head %}
+
+{% endblock %}
+
 <title>
 {% block title %}
 InvenTree