Merge tag '3.3.0' into develop

3.3.0
Update README.md

Include link to pre-commit example by @acdha
Add failing test for core problem in issue #105
Implement fix for issue #105
One too many spaces
Merge pull request #107 from timothycrosley/feature/fix-issue-105

Feature/fix issue 105
Bump version to 3.3.1
Merge branch 'release/3.3.1'