Release v0.2.9 (lm-sys#1263)

Release FastChat v0.2.5 (lm-sys#649)

Release v0.2.3 and fix bugs (lm-sys#541)

Update readme and add a simple huggingface api example (lm-sys#395)

Change `--model-name` to `--model-path` in cli.py and improve test_me…

…ssage.py (lm-sys#368)