Get spec to work
Show "changed by" in separate message
fix to work message_format param
remove ruby-debug
Introduce new option: "Don't notify for success builds"

When enabled the option, plugin won't notify for success builds.
Default to false.
Add accessor for exclude_success for configuration checkbox
Notify for recovering build even if exclude_successes is set
Bump version
Merge pull request #1 from sorah/dont_notify_for_success_builds

New option: "Don't notify for success builds"