Update todo.md
完成目录
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge pull request #36 from Unknwon/master

archive/zip.README.md and Writer.md
Create CanonicalHeaderKey.md

add 
Merge pull request #37 from qinglong1983/patch-5

Create CanonicalHeaderKey.md
Merge remote-tracking branch 'upstream/master'
Update todo.md

index 下面无文件。
Merge pull request #38 from starchou/patch-2

Update todo.md
完成html包 开始template包
Merge pull request #39 from RaymondChou/master

完成html包 开始template包
薪增加一些函数
字符串的入口地址修改
增加开始做的时间，完结时间做完之后自己修改
Update todo.md
Merge pull request #40 from qinglong1983/patch-6

Update todo.md
添加开始时间
Create DetectContentType.md

add DetectContentType.md
Merge pull request #41 from qinglong1983/patch-7

Create DetectContentType.md