suffix_tree
makefile
Merge branch 'master' into develop
remove unordered map
Merge branch 'master' of https://github.com/ZhangYou0122/algorithms into ZhangYou0122-master

Conflicts:
	Makefile
Merge branch 'ZhangYou0122-master' into develop
update README, and some indent,comment problem
Merge branch 'develop'