Replace CSV printer with more generic approach. #131
Merged
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The current CSV printer does not allow printing arbritrary data structures, which is different from the other printers.
Main problem is that it is non-trivial to map arbitrary data structures to CSV format, especially when it comes to nested structures with slices (which would produce very big tables with awkward column names).
So, the idea is now to solve the problem similar to the table printer, which requires the user to map the data structure to a two-dimensional matrix.