* Add a -s parameter to allow other than 128-bit passwords.
* Create 'man' pages (this program currently breaks my policy of
  'release no program without a man page'!). 
* Create a HOWTO document detailing how to use this *securely* in
  shell scripts and such (in particular: *NEVER* save unencrypted
  passwords on the disk! And, 'md5sum' is your friend!). 
* Add a 'check' Makefile entry which will encrypt/decrypt test data
  using various keys and make sure it encrypts/decrypts to the same thing
  as on my Intel boxes (nice for checking endianness/alignment problems,
  on Solaris SPARC and etc.)
* Add a key generator using:
      dd if=/dev/urandom bs=16 count=1 | hexdump -e '"kk=" 16/1 "%02x"'  
