Add some package documentation

Change-Id: I38a8c3d8f5c02f40f0944fbfc668fa8638a9fbbe
diff --git a/DESCRIPTION b/DESCRIPTION
index 962840c..276c531 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -25,5 +25,6 @@
 Collate: 
     'KorAPConnection.R'
     'KorAPCorpusStats.R'
+    'RKorAPClient.R'
     'KorAPQuery.R'
     'reexports.R'