Bugfix: Add eps converted to pdf for compilation using pdflatex

Problem: When changing the configuration to create a dissertation, running the makefile throughs an error on my macOS machine, because it does not convert the eps file of the licenses to pdf files. This will not happen in e.g. TexStudio, but since we provide a makefile, we should make sure it compiles right away.

I therefore added the license files converted to pdf. When they are freshly created, they should be overwritten. Maybe an even better idea would be to convert them to pdfs and get rid of the eps files in general to make sure it compiles with pdflatex. Let me know what you think.

EDIT: We will use pdf instead of eps files and I will update the request.