Modify variables type useb by inherited class GestPayCryptHS

Members declared as private may only be accessed by the class that defines the member (http://php.net/manual/en/language.oop5.visibility.php)
$host doesn't exists
adding composer.json and gitignore
missing Set/GetTransport() functions
removing php closing tags
add missing parameter in _http_get_response calls
ereg is deprecated
changing variable name with right spelling
PSR2 indenting
removing unused variable