Command line syntax:
-h, --Help Print this information
-l, --List Print list of GPUs
-g S, --GPU S Select GPU with name containing S
-i N, --GPUIndex N Select GPU index N
Also improved error handling.
- Added VMA_ALLOCATOR_CREATE_AMD_DEVICE_COHERENT_MEMORY_BIT.
- Fixed bug generating validation layers error when the extension is not enabled.
- Updated date in copyright header comments to year 2020.