Update license warpping length to conventional 80 characters for hiding the horizontal scroll bar. (#3088)

* Add Excel-vba Ebook repo.

* Add VBA Eboob Repo. and fix incorrect menu link.

* fix Wrong format line

* Fix incorrect markdown syntax.

* Refactor DB and Javascript menu ZH version md file.

Move 'MySQL, NoSQL, PostgreSQL' under menu: Language Agnostic(语言相关),

Delete a book link of [Google JSON 风格指南], it's a multiple repo. with [JSON 风格指南], 2 link is point to the same one page.

* Delete multiple ebook link

D1. [Redis 设计与实现](http://redisbook.com), wiich is the same as menu: NoSQL -> [Redis 设计与实现](http://redisbook.com)

D2. [The Little MongoDB Book 中文版](https://github.com/justinyhuang/the-little-mongodb-book-cn) wiich is the same as menu: NoSQL -> [The Little MongoDB Book](https://github.com/justinyhuang/the-little-mongodb-book-cn/blob/master/mongodb.md)

* Update comments description.

* remove multiple ebook link

* Fix machine chek issue(fix mistake link location of PostgreSQL)

* FIX machine checking [Do not use headings with similar content (544:1)]

* Fix machine checking [359:1-361:78  warning  Alphabetical ordering: swap l.361 and l.360  alphabetize-lists]

* Update license warpping length to 80 characters.

And add to README intro