pull2
Delete tuoxiaozhong.md~

delete the file with ~
Update tuoxiaozhong.md

update me
solve conflict
Merge branch 'master' of https://github.com/tuoxiaozhong/prerequisite
Delete wishing_wall.md~

delete ～
qqren's pr
	新文件：    self-introduction/qqren.md
Merge pull request #55 from qqren/master

qqren's pull request
changge
Merge branch 'master' of https://github.com/tuoxiaozhong/prerequisite
Merge pull request #56 from tuoxiaozhong/test2

Test2
I'm an newbie -- kennx
I'm an newbie -- kennx
Merge pull request #57 from kennx/master

I'm an Newbie.
added #54