Update and rename 1_reorder-v2.pl to 1st_reorder.pl

Apply this script on the 1st alignment info, single direction result, for example 'fr-en.A3.final'. The reordered 'corpus.reofr' will be generated in the same directory. You will use the reordered 'corpus.reofr' and original corpus.en to run the GIZA++ again to get the new reo-en.A3.final which will be applied on another script '2st_replace_ali.pl'.