NVidia Fix

[DaSutt]

Program crashes when starting with NVidia GPU. Queues need to be fixed. In addition the used image formats are not all supported as storage images.

[DaSutt]

Support for devices without memory with VK_MEMORY_HOST_VISIBLE_BIT | VK_MEMORY_DEVICE_LOCAL_BIT has to be added. This includes changing the buffer manager to create CPU storage buffers that are copied to the GPU buffers.