Initial public release update

This release of Filament is a small update to the initial release. Windows binaries are now available.

Features

• Added clearCoatNormal property to set a normal map on the clear coat layer
• Switch the cloth material model to a more intuitive parameterization/BRDF

Optimizations

• Optimizations in the lights assignment process
• Better multi-threading of the lights assignment process
• Reduced memory usage of the lights assignment process
• Post-processing shaders do not use highp computations anymore

Bug fixes and improvements

• Complete revamp of libimage
• Bug fixes to lights assignement
• cmgen did not process cross cube maps properly
• cmgen could sometimes use uninitialized memory when computing spherical harmonics
• Updated glslang, spirv-cross and spirv-tools
• Various fixes in the Vulkan backend