Merge pull request #9 from mashhurs/change-api_key-type-to-password

Change `api_key` configs type to `Password`.

set default_codec doc attribute

bump patch level for doc generation

update logstash-core-plugin-api dependency and bump to 3.0.0 (#5)

bump version

Remove traces and references the meta logstash gem and change it to u…

…se the new logstash-core gem.

New contributors file, without selfish mode on

Change email for [email protected]

Add Apache 2.0 License