完成几个基本函数的例子
搞定rand 的所有方法
Create NewBuffer.md
Update NewBuffer.md
Create NewBufferString.md
Create Buffer_Bytes.md
Create Buffer_Len.md
Create Buffer_Next.md
Create Buffer_Read.md
Create Buffer_ReadByte.md
Create Buffer_ReadBytes.md
Create Buffer_ReadFrom.md
Create Buffer_ReadRune.md
Merge pull request #99 from andelf/master

net/smtp finished
Create Buffer_ReadString.md
Create Buffer_Reset.md
Create Buffer_String.md
Create Buffer_Truncate.md
Create Buffer_UnreadByte.md
添加代码语法高亮