Add index_zh.html for Chinese version

[bringyou]

as said in this #7 , add a Chinese version.

@1c7 有空看看吗？

changes:

• replace i tag with b tag(in Chinese, Italics aren't not popular used for emphasis, but bold)
• not translate people's names(exclude the great Einstein)
• not translate words in photos(lack of skills)
• remove a link in Section LearnMore cuz it mentions Dalai Lama(political reason)

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修改说明：

• 强调内容用粗体替换斜体
• 保留文中人名
• 图中的英文没有翻译
• 移除了提及达赖的一个链接

[bringyou]

@aatishb hi, could you take a look?

[1c7]

Looks good to me

[aatishb]

Thanks for this, I’ll take a look this week!

…

________________________________ From: Cheng Zheng <notifications@github.com> Sent: Tuesday, October 20, 2020 5:25:12 AM To: aatishb/entropy <entropy@noreply.github.com> Cc: Aatish Bhatia <aatish@gmail.com>; Mention <mention@noreply.github.com> Subject: Re: [aatishb/entropy] Add index_zh.html for Chinese version (#12) Looks good to me — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#12 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AAOKU3RVUIWKDETYCDC2UIDSLVJPRANCNFSM4RQVWNMQ>.

[bringyou]

Happy new year, my friends 😄