UTF8 Support

[rnuernberg]

When pushing data via save we have noticed, that special chars such as german umlaute (ä,ü,ö etc) are broken. checking your code we found that you handle non utf-8 chars only in _xml_entities.

this can be fixed by using mb_encode_numericentity:

function _xml_entities ($string) {
return mb_encode_numericentity($string, array(0x80, 0xff, 0, 0xff), "UTF-8");
}

Please note, that i took the second parameter of the function form the php.net documentation - i am not sure if that covers all relevant characters.... If you intend to use the code, you may want to have a closer look at that.