check pattern on startup

TODO.md

@@ -4,7 +4,7 @@
 
 - rm printYamlData() log.Fatal(), maybe return error on all printers?
 
-- refactor parser, there's some duplicate code
+- refactor parser, there's some duplicate code, remove pattern from parser args
 
 ## Features to be implemented
 
@@ -14,6 +14,4 @@
 
 - add --no-headers option
 
--  add input  parsing support  for CSV  including unquoting  of stuff
-  like: `"xxx","1919 b"` etc, maybe an extra option for unquoting