Add some package documentation

Change-Id: I38a8c3d8f5c02f40f0944fbfc668fa8638a9fbbe
diff --git a/R/RKorAPClient.R b/R/RKorAPClient.R
new file mode 100644
index 0000000..67a35c1
--- /dev/null
+++ b/R/RKorAPClient.R
@@ -0,0 +1,10 @@
+#' \code{RKorapClient} package
+#'
+#' R pakcage to access the \href{https://github.com/KorAP/}{KorAP} web service API.
+#'
+#' See the README.md on
+#' \href{https://github.com/KorAP/RKorAPClient/}{github}
+#'
+#' @docType package
+#' @name RKorAPClient
+NULL