doc per option for docgen

hello logstash 1.1.1-rc1

latest jls-grok to fix LOGSTASH-300

- Don't hardcode the elasticsearch version in the output plugin

Merge branch 'master' into HEAD

bump version to 1.1.0beta8

- fix tests to run in and out of the jar (LOGSTASH-263)

- changelog update for 1.0.17

- note issue

- fix a changelog issue