Declare minimum version of 0.88 for Test::More

This enables the use of done_testing(), which is very useful for tests
and better than no_plan.
.build is a dzil temporary directory, ignore it
fromsplit: Remove orphaned, now useless ->get_delimiter() call

The get_values_for_line() method handles the delimiter.
fromcsv, tocsv: Add a --delim option to use alternate field delimiters

This overlaps a little bit with fromsplit and totable, but is superior
because a real parser is used (so, for example, quoted values are
parsed/output) and output is never buffered like totable.