[update] xlsx, ods files marked as documents

Author: mkozhukh

filetype.go

@@ -13,7 +13,8 @@ func init() {
 		"doc":  "document",
 		"odt":  "document",
 		"xls":  "document",
-		"xslx": "document",
+		"xlsx": "document",
+		"ods":  "document",
 		"pdf":  "document",
 		"djvu": "document",
 		"djv":  "document",