README:

- moved plop_datas ans plop_schema to app/config/
- added to plop_datas the sql command to add the user plopAdmin
- added PHPUnit to the composer.json and generate library to vendor
- AdminFinder.php modified, added a if(!empty($where)) condition before bind the value to the query
- CommentFinder.php " " "
- EventFinder.php " " " "
- PlaceFinder.php " " " "
- directory tests created
- tests\ModelTest\EntitiesTest\AdminTest.php made, so Entities\Admin.php finished