Pollish up chinese translation (intro2jl)

[inkydragon]

Based on #63 , may merge it first.

intro-to-julia/

• [x] 00.上手Jupyter notebook
• [x] 01.新手入门
• [x] 02.字符串
• [x] 03.数据结构
• [x] 04.循环
• [x] 05.条件判断
• [x] 06.函数
• [x] 07.包（Packages）
• [x] 08.绘图
• [x] 09.Julia很快
• [x] 10.多重派发
• [x] 10.1多重派发
• [x] 11.基本线性代数

all code test in julia 1.0.5 & sync with english version.

[NHDaly]

And same here:

LGTM, but we may want to invite review from a native-speaker. @Roger-luo?

[logankilpatrick]

Hey @Roger-luo and thoughts on this? Should we merge?

[Roger-luo]

yeah looks good to me.

[logankilpatrick]

Great! Thank you all for the hard work on this and sorry for the delay on merging.