New world format, fixes

src/world/LevelEvents.cpp

@@ -0,0 +1,16 @@
+#include "LevelEvents.h"
+#include "../voxels/Chunk.h"
+
+using std::vector;
+
+void LevelEvents::listen(lvl_event_type type, chunk_event_func func) {
+	auto& callbacks = chunk_callbacks[type];
+	callbacks.push_back(func);
+}
+
+void LevelEvents::trigger(lvl_event_type type, Chunk* chunk) {
+	auto& callbacks = chunk_callbacks[type];
+	for (chunk_event_func func : callbacks) {
+		func(type, chunk);
+	}
+}