REST commands also receive command name and they can replace event name
Define default "toBackend" filter for REST commands
test: Update definitions of test plugins for updated plugin spec
"toClient" filter of REST commands should return event name too.
Rename too short method:
model.isA =>
model.(class).isInstance
Define SocketCommand.isInstance()
Update definition of stub plugins for the new plugin system
Fix missing variable name:
message => body
test: Update tests for REST API
test/ Setup mocked backend connection for REST API tests correctly