Release notes for 3.6.7
Add a note about HTTP client instrumentation fixes for 3.6.7 to CHANGELOG
Merge pull request #164 from newrelic/release_notes_3.6.7

Release notes for 3.6.7
RUBY-1132 Ensure that we require EventedSubscriber before inheriting from it
Expand logging and namespace rake task.

Configuration docs rake task uses the config namespace. Log message for
unrecognized environment variables info logs both the environment variable and
the targeted setting.
Remove duplicate test.

Remove duplicate test.
Merge pull request #166 from newrelic/log_unrecognized_config_env_var

Expand logging and namespace rake task.
Merge pull request #165 from newrelic/RUBY-1132-follow-up

RUBY-1132 Ensure that we require EventedSubscriber before inheriting from it