python3 is renamed to python in Homebrew formula. [Link](https://docs.brew.sh/Homebrew-and-Python)
>> Homebrew provides one formula for Python 3.x (python) and another for Python 2.7.x (python@2).
fetchDependencies script now in top directory to avoid Travis caching of
External directory. fetchDependencies is now smart about fetching vs cloning
and building only what is necessary.
Load external library versions using script instead of Git submodules.
SPIRV-Cross, Vulkan-LoaderAndValidationLayers & VulkanSamples versions recorded in files.
glslang version determined by Vulkan-LoaderAndValidationLayers.
SPIRV-Tools & SPIRV-Headers versions loaded by glslang.
When MoltenVK is built as part of the LunarG SDK, use external libraries
sourced from parent Vulkan-LoaderAndValidationLayers.
Use Vulkan headers from Vulkan-LoaderAndValidationLayers.
No longer generate Vulkan specification.
Update documentation.
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.