Bump version to 4.1.2, update changelog

Bump version to 4.1.1

Add changelog generated from GitHub issues and PRs

Merge pull request boutproject#687 from boutproject/v4.0.1-RC

Update version to 4.0.1

Merge pull request boutproject#461 from boutproject/v4.0.0-RC

Release v4.0.0

Merge pull request boutproject#315 from boutproject/bout_runners_fix

Small bugfix bout_runners+improved doc of examples

version 3.0

version 2.1

version 2.0

version 1.0