748d3c161 Add usage recommendations to README.md
2939fcfed Replace marl::parallelize()
4b4600208 Fix stupid typo in front page code samples.
742bba9c8 Fix clang-tidy and go-vet warnings.

git-subtree-dir: third_party/marl
git-subtree-split: 748d3c16165c7dcff018273cfaf9d8f26a33333a