Adding Darwin Core support to Islandora Zip Importer

With some Drupal coding standard fix
Hello I worked with Paul Butler on this ... he was an MLIS grad student and offered to help with creating the XSLT. I've done some edit since.  I don't see any issue with using it as it was created to be incorporated into the digital herbarium project here at UPEI. Let me know if you need something else. Donald.