The suggested workaround for https://github.com/twitter/scalding/pull/864 is to replace usage of Tsv with TypedTsv. So we also need an alternative of DailySuffixTsv. That's the main purpose of this PR. Also I guess it's not a bad idea to have time-pathed version of TypedTsv.

Since TypedTsv extends TypedSeparatedFile, I assume it's fine to aslo let DailySuffixTypedTsv to extend this trait?