Read Later 0.3.2

Added

• scripts/dmg.sh builds a downloadable Read-Later.dmg with a portable app
  that opens its own library in Application Support.
• bundle.sh --portable builds that shareable bundle.
• README sections on downloading the app and on forking it with a coding agent,
  and docs/hacking.md, a map of the code for agents.

Changed

• bundle.sh points the app at .local/native only when that library exists,
  so a fresh clone or fork uses Application Support as documented.