```ruby
module Simple2ch
  class Simple2chException < Exception; end
  class NotA2chUrlException < Simple2chException; end
  class KakoLogException < Simple2chException; end
  class DatParseException < Simple2chException; end
  class NoThreGivenException < Simple2chException; end
end```

Fix Bug: Any Simple2ch exceptions could not rescued by StandardError
user
```ruby
module Simple2ch
  class Simple2chException < StandardError; end
  class NotA2chUrlException < Simple2chException; end
  class KakoLogException < Simple2chException; end
  class DatParseException < Simple2chException; end
  class NoThreGivenException < Simple2chException; end
end```
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