v0.1.0

Initial public release of atomic.

Highlights:

• Root daemon + unprivileged client model (atomicd + atomic).
• Overlayfs transaction execution with commit-on-success semantics.
• Conflict detection + recovery journal.
• Bash end-to-end integration suite with per-case execution and aggregate reporting.
• Source install/uninstall scripts and simplified quick-start UX.

See README for install, sanity check, and limitations.