Alter CSV and TSV setter methods to return self

[camertron]

First of all, thank you for writing and maintaining this excellent library, it's been working flawlessly for us :)

I'm currently in the process of integrating the UniVocity CSV parser into one of our ETL jobs. Here's the code I came up with:

CsvFormat csvFormat = new CsvFormat();
csvFormat.setLineSeparator("/");
csvFormat.setDelimiter(";");

CsvParserSettings csvParserSettings = new CsvParserSettings();
csvParserSettings.setFormat(csvFormat);

CsvParser csvParser = new CsvParser(csvParserSettings);

Whew, that's a lot of code. If all these various setter methods returned this, it would have been a lot more convenient to construct a parser instance:

CsvParser csvParser = new CsvParser(
  new CsvParserSettings().setFormat(
    new CsvFormat()
      .setLineSeparator("/")
      .setDelimiter(";")
  )
)

Ok, so that only saves one line of code (including newlines) 😅 but I would argue it's 1) easier to read, and 2) uses 2 fewer local variables. Plus it could collapse down to fewer lines and only sacrifice readability a little bit:

CsvParser csvParser = new CsvParser(
  new CsvParserSettings().setFormat(
    new CsvFormat().setLineSeparator("/").setDelimiter(";")
  )
)

Anyway, that's what this PR is trying to enable. Thoughts?

[jbax]

Thanks! I was doing this already for version 3.0.0 (which is a huge refactory) but I'll review your PR in a few days as I'm travelling and make these changes available on version 2.8.2

[camertron]

@jbax awesome thanks! If you're already working on this then please feel free to close my PR. I only care that it eventually gets done 😄

[travisneeley]

I would love to see this become part of the current and future code bases for the parsers.