A plugin should recieve the plugin-specific options to be able to proxy them to sub-plugins
Refactored tests to use more idomatic spy#calledOn and #calledWith instead of homemade objects
Emit 'err' instead of 'error' in logger to avoid throwing on unhandled error event
Support Config#addStage(... {}) and Stage#addServer({}) for the simple cases
Merge branch 'develop'
Version bump 0.0.9