Add LunarG demo app repository as a submodule.
Add LunarG demo config to makeAll script.
Rename Demos/README_MoltenVK_Demos.md to Demos/README.md.
Do not copy Demos folder to MoltenVK runtime distribution.
Do not copy ThirdPartyConfig.md to MoltenVK runtime distribution.
Add cmake as a dependency in README.md.
Fix MVKShaderLibrary missing function prototype warning.
Update to latest SPIRV-Cross.
Update to latest Vulkan-Hpp.
Update to latest Vulkan-LoaderAndValidationLayers.
Use clang instead of libtool for building dynamic library from static library.
Fix SDK issue when building dylib with Xcode 9 on Sierra.
Add scripts to update submodules to latest versions.
Update to latest versions of submodules.
Remove Brenwill code signing IDs from Demo projects.