Fix change dispatching
Adds failing test for pointer
Support pointer values as well
Fix EventId unmarshalling
Adds ParseEventId method
Adds TestGetEventNameForPointer
Move EventTypeRegister to serialization
Serializers do now use storage.Event
Fix JsonSerializer
Adds test hook for serialization package
EventTypeRegister will find and store value type

No need to store pointer types.
Deserialize event payload
Finalize tests for JsonSerializer