added in loans support, also particular route for book_for_loan without markup used as div content on loan.html page via ajax load

templates/loans.html

@@ -0,0 +1,16 @@
+{% extends "base.html" %}
+
+{% block main_content %}
+<h3>Loans</h3>
+<table id="book_table" class="table table-striped table-sm" data-toolbar="#toolbar" data-search="true">
+	<thead>
+		<tr class="thead-light"><th>Surname</th><th>Firstname(s)</th><th>Date Lent</th><th>Contact Details</th></tr>
+	</thead>
+	<tbody>
+	{% for loan in loans %}
+		<tr><td><a href="{{url_for('loan', id=loan.id )}}">{{loan.surname}}</a></td><td>{{loan.firstnames}}</td><td>{{loan.date_lent}}</td>
+		<td>{{loan.contact_details}}</td></tr>
+	{% endfor %}
+	</tbody>
+</table>
+{% endblock main_content %}