Merge branch 'hotfix/0.5.1' into develop
Merge branch 'hotfix/0.5.2' into develop
It's not as pretty, but without  aligning all the fancy alignment, we won't have to update an entire document just because we added a new, longer key name.
Add required_without_all
Wording improvement.
Include host in IronMQ, and a comment reformat
Add required_with_all
Add custom validation string example
Rearrange order of options (supposed to be less confusing)
Add ttr to beanstalk config
Update comments to Mailgun
Merge branch 'release/0.5.3'
Dependency update
Merge branch 'develop'