Database import tables on every install with "IF NOT EXISTS" (#336)

* Database import tables on every install with "IF NOT EXISTS"

This fixed errors when one table is missing or is duplicated

* Add success message on import data

* Reorder

system/src/Models/ForumBoard.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace MyAAC\Models;
+use Illuminate\Database\Eloquent\Model;
+
+class ForumBoard extends Model {
+
+	protected $table = TABLE_PREFIX . 'forum_boards';
+
+	public $timestamps = false;
+
+	protected $fillable = [
+		'name', 'description', 'ordering',
+		'guild', 'access', 'closed', 'hide',
+	];
+}