- TODO: ~ expansion in file_completion
- TODO: how do I get completion to use just the file, not the entire path?

0.8: rev 40  30 Jan 2004
This release introduced one possible compatibility issue.
- fixed a few bugs where the default command ('') wasn't being called.
- made all method calling print an error if method can't be found
- doc subroutines now get the command name as an argument
- history quick substitution ^search^repl now works
- split the parser off into Text::Shellwords::Cursor
- now join_line puts space on both sides of token_chars chars
- fixed save hist bug: GDBUI was saving the first 500 cmds instead of the last.
- now repeats the last arg in a [] arg list forever (or until maxargs)
- fixed off-by-one in parser (only when using keep_quotes option)
- Added the force_to_string completion helper routine
- raised default maximum saved history from 64 to 500
- added default command and argument handlers (if the cmd couldn't be found)
- provide bang completion, but you must enable it in your command set
- added a default history command: history_call
* completion returns an arrayref so it can return undef to highlight an error
  in your completion routines: return [@result]; instead of return @result;
- we now support automatic bang history
- we now sort help summaries
- made file completion work with absolute pathnames
- reorg'd pod, putting most important stuff at top
- we now put a final newline on the command history file

0.61: rev 22  16 Dec 2003
- initial release