refactor: Simplify/unify naming schemes. Implement general event handler.

source/Navigation/components/Navigator/Navigator.cpp

source/Navigation/libraries/client/ComponentPlugin.cpp

source/Navigation/libraries/client/ComponentPlugin.h

source/Navigation/libraries/client/Navigator.cpp

source/Navigation/libraries/client/Navigator.h

...on/libraries/client/services/EventSubscriptionInterface.h

...Navigation/libraries/client/services/MemorySubscriber.cpp

...e/Navigation/libraries/client/services/MemorySubscriber.h

...vigation/libraries/client/services/SimpleEventHandler.cpp

...Navigation/libraries/client/services/SimpleEventHandler.h

source/Navigation/libraries/core/CMakeLists.txt

source/Navigation/libraries/core/events.h

source/Navigation/libraries/server/CMakeLists.txt

source/Navigation/libraries/server/Navigator.cpp

source/Navigation/libraries/server/Navigator.h

...raries/server/event_publishing/EventPublishingInterface.h

...ion/libraries/server/event_publishing/MemoryPublisher.cpp

...ation/libraries/server/event_publishing/MemoryPublisher.h

source/Navigation/libraries/server/test/serverTest.cpp