Version 1.1
  - Added the -s and -e options for starting and ending dates.
  - Handles time changes that netdate logs in wtmp file.
  - Fixed, err, made more robust, some possible divide by zero errors.
  - Throws out null wtmp entries (where do these come from?)
  - Corrected(?) argument parsing.
  - Added rawtmp command.

Version 1.0
  - The orginal, perfect as it was.
