[changed] master to v1.

[diasbruno]

This is a patch available on master and it's original author is @claydiffrient.

All commits available on master will be ported to v1 to make things easier and safer.

Small commits will be added with git am to preserve the original patch.

Commits checklist:

• added babel stage-2 preset.

Acceptance Checklist:

• All commits have been squashed to one.
• The commit message follows the guidelines in CONTRIBUTING.md.
• Documentation (README.md) and examples have been updated as needed.
• If this is a code change, a spec testing the functionality has been added.
• If the commit message has [changed] or [removed], there is an upgrade path above.