Change [A|a] by [Aa], etc.
quick writeup on logstash-contrib for README
reverse bracketology
Merge pull request #1241 from kurtado/readme-contrib

quick writeup on logstash-contrib for README
Merge pull request #1127 from logongas/master

Change [A|a] by [Aa], etc.
Merge git://github.com/logstash/logstash