fix for #684

Author: mevdschee

README.md

@@ -276,9 +276,10 @@ Examples of filter usage are:
 
     GET /records/categories?filter=name,eq,Internet
     GET /records/categories?filter=name,sw,Inter
-    GET /records/categories?filter=id,le,1
+    GET /records/categories?filter=id,le,2
     GET /records/categories?filter=id,ngt,2
-    GET /records/categories?filter=id,bt,1,1
+    GET /records/categories?filter=id,bt,1,2
+    GET /records/categories?filter=id,in,1,2
 
 Output: