Percy

Include git meta-data when creating a build, including commit message and author.

🐞 If git branch can't be detected, stop defaulting to master. It'll now report as `unknown-branch` in Percy.

🐛 Fix branch detection on Windows.

Add build_id property to the runner. Thanks danielrozenberg!

🐞 Fix: Retry failed requests against Percy's API.

Fix path handling on Windows.

Improved error logging.