Add package level documentation and citation information

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+bibentry(
+  bibtype  = "InCollection",
+	title = "Count-based and predictive language models for exploring {DeReKo}",
+	booktitle = "Proceedings of the {LREC} 2022 {Workshop} on {Challenges} in the {Management} of {Large} {Corpora} ({CMLC}-10)",
+
+	url = "http://www.lrec-conf.org/proceedings/lrec2022/workshops/CMLC10/pdf/2022.cmlc10-1.5.pdf",
+	publisher = "European Language Resources Association (ELRA)",
+	author = c(person("Peter", "Fankhauser"), person("Marc", "Kupietz")),
+	editor = c(person("Piotr", "BaƄski"), person("Adrien","Barbaresi"), person("Simon", "Clematide"), person("Marc", "Kupietz"), person("Harald", "Lüngen")),
+	year = "2022",
+	address = "Marseille/Paris",
+	pages = "27--31",
+  urn = "https://nbn-resolving.org/urn:nbn:de:bsz:mh39-111107"
+)