ruby cookbook ref not existent anymore
add test for installing plugin agent dependencies
Revert "ruby cookbook ref not existent anymore"

This reverts commit c8f6048e9914e31412ea065a2c7a5bc83ca2e96d.
fix plugin-agent test attributes
Use `service` instead of running script explicitly

Avoids any sort of environment settings from polluting the service.

See http://askubuntu.com/a/47664 for details.
Add required keys to postgresql stanza in plugin-agent test

Undocumented, but these four keys are required for a postgresql stanza
add contributors to readme
Merge pull request #18 from chr4-cookbooks/install-dependencies-when-needed

Install dependencies when needed