Start refactor to extend HTTP_STATUS Code in exception.

extension/Documentation/Manual.rst

extension/Source/api/rest.php

extension/Source/core/Constants.php

extension/Source/core/QuickFormQuery.php

extension/Source/core/exceptions/AbstractException.php

extension/Source/core/exceptions/CodeException.php

extension/Source/core/exceptions/DbException.php

extension/Source/core/exceptions/DownloadException.php

...Source/core/exceptions/NotAcceptableResponseException.php

extension/Source/core/exceptions/RestException.php

extension/Source/core/exceptions/ShellException.php

extension/Source/core/exceptions/UserFormException.php

extension/Source/core/exceptions/UserReportException.php

extension/Source/core/helper/Logger.php