Remove pile of unmaintained sample configs
Call the setting 'user' to align with what almost every other plugin
calls that thing.
Add andreaforni
Normalize settings for punct filter.

- Rename 'field' to 'source'
- Add 'target' for where the result is stored.
- Also added some doc comments.
- Tests pass
Update CHANGELOG through previous commit (96c526473acef38697d1c948a95c928fe1324185)
Regen gemfile locks
Merge pull request #861 from jordansissel/prepare-next-release

Prepare next release
Improve docs for idle_flush_time and flush_size.
fix formatting
Merge pull request #862 from jordansissel/improve-es-flush-docs

Improve docs for idle_flush_time and flush_size.
Add vendor-clean target
Merge git://github.com/logstash/logstash