Bumping version to 1.16.3

Fixing unused var warnings in MSVC

Fixing some bugs related to changing the default from -tex_array to -…

…individual:

- If -output_file is specified and there's more than 1 input, it errors out as this would overwrite the output file multiple times
- Tex types cubemap/3D default to tex_array mode

Update README.md

Update README.md

Merge pull request BinomialLLC#234 from omar-polo/master

fix the build on OpenBSD

Merge pull request BinomialLLC#234 from omar-polo/master

fix the build on OpenBSD

Update README.md

Rebuild WASM files

Update README.md

- Global codebook related fixes

- Minor fix to basisu_frontend::optimize_selector_codebook() so the new_selector_cluster_indices array is initialized correctly. (The backend doesn't use this array so no harm was being done.)