Converter - loop over each field_map item

Here's an attempt at demonstrating what I mean by 'per-item basis', the idea is to loop over each field_map item, individually, query its content from the old forum, store it in the new, and do the extra stuff before the next one.  So the loop starts with 'foreach ( $this->field_map as $item ) {' and goes down to the query and beyond.

Note that this is essetially for demo purposes, as of now I didn't get it to work, either buggy or there are impacts I haven't figured out yet...?

Comments ?