split string

string[] split_string (string str, string delimiters)
{
    Gee.ArrayList<string> list = new Gee.ArrayList<string>();
    string token = Posix.strtok (str, delimiters);
    while (token != null)
    {
        list.add (token);
        token = Posix.strtok (null, delimiters);
    }
    return list.to_array();
}