Lymph

======
- Added nose2 plugin
- Fixed access to dotted config keys

======
- Added RPC versioning support
- Added --dump-headers option for ``lymph request``

======
- Added ``--json`` option for ``lymph request``
- Added a generic health check endpoint for WebServiceInterface
- Added `app_name` support for newrelic plugin

======
- Added monitoring for psutil metrics
- Added RPC call entries in New Relic traces

======
- Made rpc connection properties configurable
- Simplified collecting custom metrics

======
- Added retry support for event handlers.
- Added event handler tracking for the newrelic plugin.
- Fixed trace id propagation for deferred rpc calls.