birnpack v0.1.0

⚠️ Superseded by v0.1.1 — binaries on THIS release have been updated to the fixed v0.1.1 builds (crash on files >128 KB fixed: model moved from thread stack to heap). Output format unchanged.

Original notes: first public release. birnpack c IN OUT / birnpack d IN OUT. Windows may show a SmartScreen warning (unsigned build) — More info → Run anyway.