Needed for Tangra_Form_Submit_Method::POST and Tangra_Form_Submit_Method::GET
Needed for automatic change of form encoding to Form::ENCODING_MULTIPART
require_once
(TANGRA_MAIN_DIR.'exceptions/te_form_field_not_exists.class.php')
[line 43]
require_once
(TANGRA_MAIN_DIR.'exceptions/te_form_field_already_exists.class.php')
[line 38]