Config is an application-level "component" initialized from an application plugin.
All usages on application/project-level should declare explicit dependency on it.
Tests can either create a new instance or access the shared one.
A reusable Config app component to be responsible for all level of configurations: default/system/user/ui.
Swith to Config interface instead of map<string,Object> for options.
Add an UI option to control whether trace is enabled.
Fedor Isakov