Fixed JSON serialization.
gd::InitialInstancesContainer::IterateOverInstances is now passing a pointer. (For use with emscripten, so that the "$$.ptr" element of the instance passed as parameter is constant).
Fixed serialization of some classes.
Fixed serializer JSON saving and added loading from JSON.
Exposed gd::Serializer::From/ToJSON to embind.
Added more visible buttons to add automatisms to objects in the IDE.