Springer has granted online access to the full proceedings until Nov. 12, 2015. They can be found here:
Also, some people have reported problems retrieving the preprints from the USB memory stick. The memory stick was configured to emulate a CD-ROM drive. At least one attendee reported that their Linux did not automount this partition, but when they mounted it manually, they were able to access the files. If you still cannot access the files please e-mail us at firstname.lastname@example.org.