Add a Custom Auditor mention to the README
Add a Custom Auditor mention to the README

I scratched my head a bit on this one. I could only find my answer here https://github.com/collectiveidea/audited/blob/cd7065ef6fb9640a3a4e204477dd38dc0d12e50c/lib/audited/adapters/active_record/audit.rb#L40
Datacom/audited,ishail/audited,ontrack/audited,reenhanced/audited,azanar/audited,simplepractice/audited,ledermann/audited,collectiveidea/audited