request for english translation

第一章的翻译根据issue #3的回答，做了适当地调整。

第二章的2.1、2.2和2.3已经完成。第二章的`README.md`也全部翻译完成，但是有几个问题，都列在`README.md`的源码中了，你merge时候看看。

This request includes:

0. draft translation of chapter 01
0. capitalizing title in table of content for chapter 01
0. draft translation of section 2.1; 2.2; 2.3
0. draft translation of `README.md` of chapter 02, but some questions listed in source code need to be confirmed