Constants file deleted due to incompatibility with the PrestaShop engine.

Engine uses "eval('if (false){' . $module_source . '}')" to check for syntax errors in the main module file.
But it is impossible to use "if (false){ use NamespaceName;}" in php.
Fixed module installation process.
Fixed configuration saving.
Implemented PaynetEasy payment information saving.
implemented PaynetEasy payment response processing.
Implemented order creation after response processing.