Progress: FSS read and write programs.

Progress: FSS read and write programs.

Use \b (backspace character) instead of \0 (NULL character).
- The bash programs and functions like "echo" automatically strip NULL characters.
- This defeats the purpose of providing these functions for manipulating FSS files using these programs.

Add an ignore range list.
- The pipes represent the start and stop of an ignore range using the \v (vertical tab character).
- Only the FSS-0003 (Extended List) utilize the ignore range.
- This ignore range list provides a simple way to manage nested lists without having to write complex recursive parsers.
- For consistency, all FSS write programs utilize the -I/--ignore parameter, but for the standards that do not support ignore range lists then that parameter is essentially ignored.
- The ignore lists only applies to Content.

Fix bug in the fll_error where the wrong variable is being used (should be printing a newline).