Exllamav2

- Support for Command-R-plus
- Fix for pre-AVX2 CPUs
- VRAM optimizations for quantization
- Very preliminary multimodal support
- Various other small fixes and optimizations

**Full Changelog**: https://github.com/turboderp/exllamav2/compare/v0.0.17...v0.0.18

Mostly just minor fixes and support for DBRX models.

**Full Changelog**: https://github.com/turboderp/exllamav2/compare/v0.0.16...v0.0.17

- Adds support for Cohere models
- N-gram decoding
- A few bugfixes
- Lots of optimizations

**Full Changelog**: https://github.com/turboderp/exllamav2/compare/v0.0.15...v0.0.16

- Adds Q4 cache mode
- Support for StarCoder2
- Minor optimizations and a couple of bugfixes

**Full Changelog**: https://github.com/turboderp/exllamav2/compare/v0.0.14...v0.0.15

Adds support for Qwen1.5 and Gemma architectures.

Various fixes and optimizations.

**Full Changelog since 0.0.13**: https://github.com/turboderp/exllamav2/compare/v0.0.13...v0.0.14

**Full Changelog**: https://github.com/turboderp/exllamav2/compare/0.0.13.post1...0.0.13.post2