GGUF: FastFlux (Flux.1-Schnell Merged with Flux.1-Dev)

I created the original (v1) from an fp8 checkpoint. Due to double quantization it accumulated more error. So I found that v1 couldn't produce sharp images. For v2 I manually merged the bf16 Dev and Schnell checkpoints and then made the GGUF. This version can produce more details and much more crisper results.