@change DataTablesFormat.php and DataTablesUtil.php moved to datatables folder.
@change BusinessRuleException.php, EntityChanger.php, EntityCounter.php, EntityFinder.php, EntityRepository.php, and BusinessRuleException.php moved to "entity" folder.
@change RangeCheck.php moved to "entity" folder.
@change FileUtil.php documentation improved.
@change entity/BusinessRuleException.php and entity/RangeCheck.php removed from the project.
@change autoload.php changed to work inside or outside the 'php-util' folder. Its documentation were also improved.
@change invoker.php documentation was improved;