Preliminary modifications to tapas_transform to accomodate step 2 of 2 step upload.
Fix how we're assigning to the  array in the save_to_hydra function; implement simpler version of tapas_transform (send remote request to save files to the repository, disregard its response and proceed with previously implemented XSLT transforms on the drupal side.)
Hopefully make check existence/assign value pattern of certain attributes in save_to_hydra more obvious, ensure errors are actually printed in watchdog.