Change the way columns are named upon reading data. Now the user passes a sequence of characters to indicate what each columns represents. If a header row is present, create a map of internal names and column labels from the header. Eliminate the formatting information from format.json; rename it to codebook.json.
Add some facilities to parse column entries upon loading data. Get rid of hard-coded column for group label when parsing codes.
Add keyword option to plot a Section in map view.
Print a warning in case of an invalid value supplied for view.