Add citation

CITATION.bib

@@ -0,0 +1,12 @@
+@article{kerpedjiev2018higlass,
+  author = {Peter Kerpedjiev and Nezar Abdennur and Fritz Lekschas and Chuck McCallum and Kasper Dinkla and Hendrik Strobelt and Jacob M Luber and Scott B Ouellette and Alaleh Ahzir and Nikhil Kumar and Jeewon Hwang and Burak H Alver and Hanspeter Pfister and Leonid A Mirny and Peter J Park and Nils Gehlenborg},
+  title = {HiGlass: Web-based Visual Exploration and Analysis of Genome Interaction Maps},
+  journal = {Genome Biology},
+  year = {2018},
+  month = {8},
+  day = {24},
+  volume = {19},
+  number = {1},
+  pages = {125},
+  doi = {10.1186/s13059-018-1486-1},
+}