Big archival update

mktar now experimentally supports SHA256 checksums and age encryption.

mktar-batch is a version of mktar that strips out the 'clever' algorithm
detection and includes a batch processing/common passphrase mechanism.

Updated tests for mktar.

Refactored code into multiple 'packages'. One day these may be
independently installable. For now it's just an organization method.

Rewrote main README and added per-package READMEs.

Also: bug fix on whiched and whichvi. They formerly propogated an error
if $EDITOR or $VISUAL were set to a non-existant executable. Also
improved the inline documentation.

Remove temp test files

Refactor tests

Add rmold and resetx

Added networking scripts (i.e. vpn*); Updated style of most scripts

Added wg*, fw*, docker*, android*, pactl*, vimsplit; Update to enumerate

Added tarls; Update to mktar for archiving directories

Initial commit of cleaned-up dev branch