Enhance README with project details and usage

Remove wrong decription

update images with Coxeter diagrams

add image for 534-1100

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Merge pull request #7 from neozhaoliang/update-gallery