update: structurize project and append quotes

Author: cangSDARM

README.md

@@ -6,23 +6,46 @@
 [![npm version](https://badge.fury.io/js/typescript.svg)](https://www.npmjs.com/package/typescript)
 [![Downloads](https://img.shields.io/npm/dm/typescript.svg)](https://www.npmjs.com/package/typescript)
 
-[TypeScript](https://www.typescriptlang.org/) is a language for application-scale JavaScript. TypeScript adds optional types to JavaScript that support tools for large-scale JavaScript applications for any browser, for any host, on any OS. TypeScript compiles to readable, standards-based JavaScript. Try it out at the [playground](https://www.typescriptlang.org/play/), and stay up to date via [our blog](https://blogs.msdn.microsoft.com/typescript) and [Twitter account](https://twitter.com/typescript).
 
-Find others who are using TypeScript at [our community page](https://www.typescriptlang.org/community/).
+## Goal
+1. Compatible with all JavaScript syntax, and extend the syntax based on JS;
+2. Statically analyze the code to find the code that is likely to have BUG;
+3. Generate pure JavaScript code without any optimization or processing of the code, **even errors in the source code are retained in the generated code**;
+3. **Does not affect the runtime environment of the generated code**.
 
-## Installing
 
-For the latest stable version:
-
-```bash
-npm install -g typescript
+## Project structure
+```
+├── bin                # the final tsc and tsserver commands for users
+├── doc                # language specification document
+├── lib                # system standard library and localization of prompt information, LKG
+├── loc
+│ └── lcl              # error message localization
+├── scripts            # tool scripts when developing projects
+├── src                # source code
+│ ├── compiler         # compiler source code
+│ │ ├── transformers   # transformers with different target syntax
+│ │ ├── scanner.ts     # grammar analysis: scan a single file, lexical analysis
+│ │ ├── parser.ts      # grammar analysis: get tokens to generate AST tree, syntax analysis
+│ │ ├── binder.ts      # semantic analysis: analysis scope, create symbol table; analysis process, create flow diagram
+│ │ ├── checker.ts     # semantic analysis: type checking, do semantic analysis
+│ │ ├── transformer.ts # optimization generation: syntax conversion and polyfill
+│ │ ├── emitter.ts     # optimization generation: JS code generation
+│ │ ├── system.ts      # tools: OE
+│ │ └── types.ts       # tools: key data structures and interfaces
+│ └── services         # language service, mainly used by VSCode. Searching for definitions and other functions
+└── tests              # test
 ```
 
-For our nightly builds:
+![compile diagram](./asset/158732-20200113115412762-1000035138.png)
 
-```bash
-npm install -g typescript@next
-```
+## More Info
+
+*  [microsoft/TypeScript/README](https://github.com/microsoft/TypeScript/blob/master/README.md)
+*  [Language specification](https://github.com/microsoft/TypeScript/blob/master/doc/spec.md)
+*  [roadmap](https://github.com/microsoft/TypeScript/wiki/Roadmap)
+*  [TypeScript 源码详细解读](https://www.cnblogs.com/xuld/p/12180913.html)
+*  [TypeScript Deep Dive](https://basarat.gitbook.io/typescript/)
 
 ## Contribute
 
@@ -40,12 +63,6 @@ This project has adopted the [Microsoft Open Source Code of Conduct](https://ope
 the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [[email protected]](mailto:[email protected])
 with any additional questions or comments.
 
-## Documentation
-
-*  [TypeScript in 5 minutes](https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html)
-*  [Programming handbook](https://www.typescriptlang.org/docs/handbook/basic-types.html)
-*  [Language specification](https://github.com/microsoft/TypeScript/blob/master/doc/spec.md)
-*  [Homepage](https://www.typescriptlang.org/)
 
 ## Building
 
@@ -100,8 +117,3 @@ gulp help              # List the above commands.
 ```bash
 node built/local/tsc.js hello.ts
 ```
-
-
-## Roadmap
-
-For details on our planned features and future direction please refer to our [roadmap](https://github.com/microsoft/TypeScript/wiki/Roadmap).