STILL TO DO: Implement S3::Acl.

STILL TO DO: Optional argument to Put and Get for compares: remote
bucket holding the contents you're comparing, so if you do a GetBucket
you don't have to do Head.

STILL TO DO: Parse headers with multiple lines per header. (Especially
x-amz-meta-* headers.)

STILL TO DO: Fix Push, Pull, Toss to not be cut-paste development.

STILL TO DO: Add test to check that -compare never -delete true does
what you would want it to do.

STILL TO DO: Modify S3.tcl to remove xsxp and use TclDOM instead.

STILL TO DO: Add UI, both command-line and graphical.

STILL TO DO: Finish OddJob, a separate application based on S3.

