CSV output

An output for writing CSV files or other string delimited file formats
Internally based on the file output and the ruby stdlib CSV library

hope it's OK and can be included in Logstash, please send me any feedback you may have.

Matt (mattg_ on irc)

ps: Because I've inherited from Logstash::Output::File, the plugin description isn't generated correctly for the documentation.

pps: resubmission of https://github.com/logstash/logstash/pull/846 with cleaner history and removing accidentally committed Gemfile.lock