added document vault and bug fixes on profile and staff members controllers

app/Models/DocumentType.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class DocumentType extends Model
+{
+    protected $guarded = array('id');
+    public $table = "document_types";
+}