Move agenda creation to single include

This is to minimize problems arizing from adding and removing recurring events

inc/agenda.php

@@ -0,0 +1,11 @@
+<?php
+require __DIR__ . '/../src/_autoload.php';
+require __DIR__ . '/../sql_config.php';
+
+$pdo = new \PDO($dbDsn, $dbUser, $dbPass);
+$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$agenda = new \pvv\side\Agenda([
+		new \pvv\side\social\NerdepitsaActivity,
+		new \pvv\side\social\AnimekveldActivity,
+		new \pvv\side\DBActivity($pdo),
+	]);