support dspace metadata-import format

* add items mode:

petya@dspace4-test:~/github/kohts/archive/trunk/tools$
./tsv_to_dspace.pl
--input-file /home/petya/afk-status.tsv.txt
--output-metadata-tsv /home/petya/metadata.tsv-klyukina
--include-collection-ids "of-10141-80 of-10141-1"
--target-collection-handle 123456789/2
--add-items

* map-file mode (update items mapping by metadata-export output)

petya@dspace4-test:~/github/kohts/archive/trunk/tools$
./tsv_to_dspace.pl
--input-file /home/petya/afk-status.tsv.txt
--output-metadata-tsv /home/petya/metadata.tsv-klyukina
--include-collection-ids "of-10141-80 of-10141-1"
--map-file /home/dspace/metadata.1389730744