Fix the issue that the Download part looks confusing.
-rw-r--r-- 28 .gitignore
-rw-r--r-- 96 README.md
drwxr-xr-x - docs
drwxr-xr-x - fonts
-rw-r--r-- 214615 hawq.png
drwxr-xr-x - images
-rw-r--r-- 18657 index.html
drwxr-xr-x - javascripts
drwxr-xr-x - script
drwxr-xr-x - style
drwxr-xr-x - stylesheets
drwxr-xr-x - subnavs