Always display the completion percentage if stderr is a tty.
Drop the char-by-char transfer mode, it was based on an incorrect assumption
regarding the semantics of fread().
Finally (I hope) straighten out the business of setting the mtime, as well as
when to remove the output file and when not to.
Thanks are owed to the many who have provided nearly instantaneous and
highly constructive feedback and suggestions about these matters.
around the call to fetchStat().
Catch SIGINT, and rework the signal handling so it doesn't skimp on the
cleanup after a timeout or interrupt. Also, don't just bail out after a
timeout; there may be more files to fetch.
Fix a bug where the stats code would print the expected size instead of the
number of bytes received.
Fix the reading code so it'll support partial reads.
