Simplify CSV command options

[charphi]

Some commands have a lot of options (such as CSV format options and Obs format options).
These options add complexity to the application and clutter the integrated help.

The functionalities provided by some of these options could be achieved by using other command lines through pipes.
For example : https://csvkit.readthedocs.io/en/latest/scripts/csvformat.html

[charphi]

CSV format options are replaced by RFC4180.
Obs format options are replaced by ISO.

[charphi]

Done in 3d131d0