Added Spanish translation by Franc1sco
Improvements for droppable gifts

* Better support for custom models
* Now allows having a different model for credits

Something is up with smartdm though, it didn't add the model texture to
the download table. This might've something that was wrong with my
homecooked model, but it worked using SM File/Folder Downloader.
Updated danish translation.
Merge remote-tracking branch 'upstream/master'