finished io_checklist

Finally, finished io_checklist. It wasnt easy thought. took couple hours to get it working.

Things i had trouble with was creating the constructor where we had to set the items and pass to io_frame. with hashan help was able to finish it pretty quick

IO_Frame myFrame(IO_Field::getRow(), IO_Field::getCol(), maxlen + 6, _len+2);
*static_cast(this) = myFrame;