This document describes some things that I have planned for bestfit,
and may or may not implement in the future.

rewrite knapsack.c to use less memory...

internationalization

-u, --unit-size=SPEC
  smallest unit size - larger speeds up algorithm (>= DEFAULT_BLOCK_SIZE)
  default is one block (DEFAULT_BLOCK_SIZE)

--block-size=SPEC
  support for changable blocksize?
  this affects --unit-size, --space (is 'bl' unit)

support values for --block-size, --space, --unit-size a la GNU fileutils blocksize?
  also for output ("xxx M");
  see: info "File utilities" "Common options" "Block size"

find better name for some options, such as --space.