Add chunks_by.
Fixed typos in CHANGELOG.md
Merge pull request #1632 from jwarwick/change_typo

Fixed typos in CHANGELOG.md
Rename manifest -> manifests to support compilers with multiple manifests
Merge pull request #1630 from Raynes/chunks_by

Add chunks_by
Make a distinction in between overriden and converged, closes #1631
Deprecate :umbrella path opt in favor of :in_umbrella

The previous :umbrella option was ambiguous, as it was not clear
if it was a dependency inside an umbrella or an umbrella dependency.
Update CHANGELOG