add event system and use it to propagate to print traces

src/lib/eventsystem/EventHandlerBase.cpp

@@ -0,0 +1,7 @@
+#include "EventHandlerBase.h"
+
+unsigned int EventHandlerBase::s_nextId = 0;
+
+EventHandlerBase::EventHandlerBase(): m_id(s_nextId++)
+{
+}