Merge branch 'develop'
Update README.md
Merge branch 'develop'
add demo_dot.svg
Update README.md
Update README.md
add demo_graph.png
Merge branch 'master' of https://github.com/xtaci/algorithms
Update README.md
Update README.md
Update README.md
update README.md
add better .dot printing
update kmp_demo
update demo of bellman-ford
update demo of base64
revert rbtree for root property
indent rbtree defs
Merge branch 'master' into develop
update BFS & DFS, using CLRS method