Add package inclusion policy and guidance

app/templates/base.html

@@ -105,6 +105,7 @@
 	<footer>
 		Copyright &copy; 2018 to <a href="https://rubenwardy.com/">rubenwardy</a> |
 		<a href="{{ url_for('flatpage', path='help') }}">Help</a> |
+		<a href="{{ url_for('flatpage', path='policy_and_guidance') }}">Policy and Guidance</a> |
 		<a href="https://github.com/minetest/contentdb">GitHub</a>
 	</footer>
 </html>

app/templates/packages/create_edit.html

@@ -10,6 +10,12 @@
 {% block content %}
 	<h1>Create Package</h1>
 
+	<div class="box box_grey alert alert-info">
+		Have you read the Package Inclusion Policy and Guidance yet?
+
+		<a class="alert_right button" href="{{ url_for('flatpage', path='policy_and_guidance') }}">View</a>
+	</div>
+
 
 	{% from "macros/forms.html" import render_field, render_submit_field, form_includes, render_multiselect_field, render_mpackage_field, render_deps_field, package_lists %}
 	{{ form_includes() }}