print it as a table, or without the glyphs

--format takes text, json, csv, tsv or ics. --json and --ics stay as
shorthand, because the widgets already call them.

csv and tsv are RFC 4180 quoted, one header row, one row per day, with
commemorations joined by a semicolon: a cell that is itself a table is worse
than a cell you have to split. --list-fields prints the twenty columns,
--fields picks a subset in the order you name them, and a column that does
not exist is caught before anything is printed rather than silently emitting
an empty cell.

--no-emoji drops the glyphs from every format, including the emoji field in
the JSON, and collapses the column in the text output rather than leaving a
hole where a glyph used to be.

README.md

@@ -120,11 +120,19 @@ spiritual father can.
 ## Output
 
 ```console
-$ typikon --json --days 7        # for a bar, a widget, a script
-$ typikon --ics --days 365 > orthodox.ics
-$ typikon --year 2027            # a year's key dates, to check against yours
+$ typikon --days 7                       # for a person
+$ typikon --format json --days 7         # for a bar, a widget, a script
+$ typikon --format csv --days 365        # for a spreadsheet
+$ typikon --format tsv --fields date,fast,title
+$ typikon --format ics --days 365 > orthodox.ics
+$ typikon --year 2027                    # a year's key dates, to check against yours
 ```
 
+`--no-emoji` drops the glyphs from every format, for a terminal or a bar
+without them. `--list-fields` prints the columns `csv` and `tsv` can take, and
+`--fields` picks a subset in the order you name them. `--json` and `--ics`
+still work as shorthand.
+
 The JSON shape is flat and stable. Front ends are the thing most likely to be
 written by someone else, and a schema that shifts underneath them is a bad
 neighbour.