Support OS X backspaces, do as little as possible between the getch() and the clear().
Better filename searching.

Now we do fuzzy matching (a*b*c), but we prefer matches that have fewer
gaps between the tokens in the search.
Make the find command work for Macs, too.
Updating issue list.
Smarter eligible_filenames starting point.

If we're matching on "hello", don't start whittling down the eligible
files from all possible ones.  Just start with the eligible files from
"hell".