+Input format:
+
+ row 1 label
+ column label for a thing
+ column label for a different thing: cell contents
+
+ row 2 label
+ column label for a thing
+ ...
+
+Several bang-commands are available to control output formatting:
+
+* `!col <column>` to force column ordering, overriding frequency-ordering.
+* `!colsep` to leave a insert a gap between columns (skip two lines to leave a gap between rows).
+* `!col_threshold <N>` to set the threshold at which entries get columns rather than being left as notes on the right. Default: 2
+* `!hide <column>` to omit a column
+* `!label <column>:<new label>` to change a column's label without needing to change all the input occurrences.
+* `!mark <column>:<mark>` to change the character that is used as the tally-mark for that column
+