Use pipes to directly create encrypted archive.

Dropping verification of tar.
Expanding docblock.
Updating copyright year.
Fix fill for GNU sed, workaround old BSD sed.
Beautify dots for dry.
Fix version number.
Fixing version number.
Prevent errexit in fill.
Extract verifyarchive; archive will not verify anymore.
Adding two tasks.
Simplifying README, mention contrib.
Adding reason for disabling errexit.
Adding download function.
Improve sync_sanity.
Shorten download message.
Forcefully remove read-only files.
Quiet clone, do not use hardlinks.
Do not show header; version; new usage.
Reformat config loaded message.
Change title casing.
Do not use curl progress when piping into tar.