Better indexing on bitsavers

[Al Kossow]

File name[24 characters]  Index key [24 character part number]  Printed page
number [8 characters]  Optional PDF page number if different [8 characters]

I picked multiples of 8 for tabbing and it fits within 80 col.

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The only thing I'd suggest is if you want to include the file name, put it
at the end, since filenames are pushing past 32 characters now as I put more
descriptive file names up.

<part number> <page number> <optional bookmark number> <optional filename>

This obviously generalizes to:

<keyword> <page number> <optional bookmark> <optional filename>

23 characters is probably adequate for <keyword>

<filename> probably should be a URL, but that runs into problems with
mirrors and all sorts of messy stuff when files move around in the
heirarchy (sometimes groups of files get pushed down into new directories
as more info on some topic shows up)