message: Update bibtex to match the one from IEEE
diff: @@ -150,9 +150,10 @@ If you use Visionaray or some of its code for your scientific project, it would
  @inproceedings{zellmann:visionaray,
  author = {Zellmann, Stefan and Wickeroth, Daniel and Lang, Ulrich},
  title = {Visionaray: A Cross-Platform Ray Tracing Template Library},
  -booktitle = {Proceedings of the 10th Workshop on Software Engineering and Architectures for Realtime Interactive Systems (IEEE SEARIS 2017)},
  +booktitle = {2017 IEEE 10th Workshop on Software Engineering and Architectures for Realtime Interactive Systems (SEARIS)},
  year = {2017},
  -publisher = {IEEE}
  +publisher = {IEEE},
  +pages = {1-8},
  }
  ```
  