* stack setup for HLB and Nim
* build_packages.sh and daml-ledger.cabal
* update README
* export-package for daml-ledger
* export-package, run here
* find tmp daml-ledger
* update README for review comments
* ref daml instructions
* further improve the process and documentation in response to comments
* have -with-rtsopts match the bazel build
* fixes for Gary