Polished up the list of contributors
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@@ -108,6 +108,7 @@ To accept, please:
| Maxim Antonov | | Moscow, Russian Federation | 2018-01-14 |
| Aditya Srinivasan | | Washington DC, USA | 2018-02-02 |
| Sevastyan Pigarev | | Barnaul, Russian Federation | 2018-03-27 |
+| Mariusz Kaligowski | | Poland | 2018-04-26 |
| Michael Altenburger | | Vienna, Austria | 2018-09-29 |
| Leonora Der | ELTE Faculty of Informatics | Budapest, Hungary | 2018-10-20 |
| Benjamin March | | Munich, Germany | 2018-10-28 |
