Add reimport of package meta from latest release

Fixes #127

app/templates/packages/create_edit.html

@@ -28,6 +28,17 @@
 		{{ _("Have you read the Package Inclusion Policy and Guidance yet?") }}
 	</div>
 
+	{% if package and package.checkPerm(current_user, "REIMPORT_META") and package.releases.first() %}
+		<form class="alert alert-secondary mb-5" method="post" action="{{ package.getUpdateFromReleaseURL() }}">
+			<input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
+			<input class="btn btn-sm btn-warning float-right" type="submit" value="{{ _('Import') }}" />
+
+			<b>{{ _("Reimport meta from latest release.") }}</b>
+			{{ _("This will override 'provides', 'dependencies', and 'optional_dependencies'.") }}
+			<div style="clear:both;"></div>
+		</form>
+	{% endif %}
+
 	<noscript>
 		<div class="alert alert-warning">
 			{{ _("Javascript is needed to improve the user interface, and is needed for features