backup: btrfs incremental backup
backup: tweak usage
backup: expand usage description
backup: add --help, tweak arg-checking
backup: add direct SRC/DEST args to use without mnt-ing
backup: remove trailing forward slash from src/dest
backup: ensure that the send/receive creates a new snapshot on dest
backup: create a symlink to the latest backup in the root of dest, called "backup"
install[apt]: install parcellite
xinitrc: run parcellite to fix the X clipboard persistence bug
install[snapshot]: add a script for making a readonly btrfs snapshot and add it to sudoers nopasswd
backup: rename getLastSnapshot => getLastBackupSnapshot
fcrontab: add jobs for daily/hourly/fivemin snapshots of /home
fcrontab: disable snapshot jobs