- opts.sheetRows limits parsing; default (0) parses all rows
- added -n mode to xlsx2csv to control number of rows
- !ref will be adjusted; !fullref holds full range
- opts.bookDeps parses calc chain; now chains are not parsed by default
- getzipdata safe option obviates some try-catch blocks
- parsing cell type 'd' (h/t @malphettes, yet again :)
- opts.WTF throws on errors