Weekly pre-release

Improvements

• Faster (21-26% on 1080p content with 8 tiles).
• Tracing support via hawktracer
• Basic in-bitstream timing info support
• ASM building is parallel now.

Changes

• CDEF damping is adjusted based on quantizer

Fixes

• Builds cleanly on rust 1.40
• Docs.rs generation is working

Known issues

• #1858 `Tune PSNR may cause desyncs on 4k content"