Support CSV reading for input data

[rschwietzke]

Right now, we don't read CSV the official way aka it is a very cheap substitute that breaks when we have newlines in quotes, for instance. Use Apache.CommonsCSV to offer to read data as CSV and expose the ability to read a col by name or line or such things aka auto-interpretation of headers if desired, you can select the format of CSV too, and so forth.

We will review the API after the first implementation to make it elegant but efficient.