Improved TopoQueue design.
detachObservers() refactoring.
Cleanup.
Merge branch 'master' of https://github.com/schlangster/cpp.react
Fixed logging.
Misc fixes.
Added domain traits.
Using specialized versions of TurnBase and ReactiveInput for sequential and parallel operation to avoid concurrent_vectors when they are not required.
Fixed synced Iterate nodes + some other graph tweaks.
Added tests for synced Iterate and IterateByRef.