+ change the order of Allocator and Dispatch template arguments for functions returning a std::vector<UniqueStuff>, as the Allocator needs to use the Dispatch in those cases!
As it turned out to not provide a complete solution to the C++-API-change issue on logical-change of the C-API, we simply remove those implicit cast operators. That is, accessing the result and the value need to be explicit.
* Add samples SecondaryCommandBuffer and SeparateImageSampler.
+ made some helper functions more explicit.
* Add sample Template, some generalizations in utils, some minor improvements in various samples.
