[clangd] Use the clang-tools-extra as the official repo for `vscode-clangd` extension.

[hokein]

Summary

Previously, we use a separate GitHub repository (https://github.com/llvm-vs-code-extensions/vscode-clangd)
for publishing vscode-clangd extension to marketplace.

To reduce the maintain burden, we will use the vscode extension in the
clang-tools-extra, and deprecate the one on GitHub.

Test in https://marketplace.visualstudio.com/items?itemName=llvm-vs-code-extensions.clangd-vscode-test

[sammccall]

clangd/clients/clangd-vscode/README.md

16

The fact that you need to install clangd seems to belong here, not as "configuration".

39

node.js

clangd/clients/clangd-vscode/package.json

46

use the SVN path?
npm says this should be a machine readable SCM url, which these github web urls aren't.

consider adding homepage/bugtracker, which are also shown on the marketplace page: https://marketplace.visualstudio.com/items?itemName=tht13.python

[hokein]

Address review comments and add license.

clangd/clients/clangd-vscode/README.md

+# vscode-clangd
+
+Provides C/C++ language IDE features for VS Code using [clangd](https://clang.llvm.org/extra/clangd.html).
+
+## Usage
+
+`vscode-clangd` provides the features designated by the [Language Server
+Protocol](https://github.com/Microsoft/language-server-protocol), such as
+code completion, code formatting and goto definition.
+
+**Note**: `clangd` is under heavy development, not all LSP features are
+implemented. See [Current Status](https://clang.llvm.org/extra/clangd.html#current-status)
+for details.
+
+To use `vscode-clangd` extension in VS Code, you need to install `vscode-clangd`
+from VS Code extension marketplace.
+
+## Configuration
+
+`vscode-clangd` will attempt to find the `clangd` binary on your `PATH`.
+Alternatively, the `clangd` executable can be specified in your VS Code
+`settings.json` file:
+
+```json
+{
+    "clangd.path": "/absolute/path/to/clangd"
+}
+```
+
+To obtain `clangd` binary, please see the [installing Clangd](https://clang.llvm.org/extra/clangd.html#installing-clangd).
+
+## Development
+
+A guide of developing `vscode-clangd` extension.
+
+### Requirements
+
+* VS Code
+* nodejs and npm
+
+### Steps
+
+1. Make sure you disable the installed `vscode-clangd` extension in VS Code.
+2. Make sure you have clangd in /usr/bin/clangd or edit src/extension.ts to
+point to the binary.
+3. In order to start a development instance of VS code extended with this, run:
+
+```bash
+   $ cd /path/to/clang-tools-extra/clangd/clients/clangd-vscode/
+   $ npm install
+   $ code .
+   # When VS Code starts, press <F5>.
+```

clangd/clients/clangd-vscode/README.txt

-A *toy* VS Code integration for development purposes.
-
-Steps:
-1. Make sure you have clangd in /usr/bin/clangd or edit src/extension.ts to
-point to the binary.
-2. Make sure you have nodejs and npm installed.
-3. Make sure you have VS Code installed.
-4. In order to start a development instance of VS code extended with this, run:
-   $ npm install
-   $ code .
-   When VS Code starts, press <F5>.

clangd/clients/clangd-vscode/package.json

 {
-    "name": "clangd-vscode",
-    "displayName": "clangd-vscode",
+    "name": "vscode-clangd",
+    "displayName": "vscode-clangd",
     "description": "Clang Language Server",
-    "version": "0.0.1",
-    "publisher": "Unpublished",
+    "version": "0.0.2",
+    "publisher": "llvm-vs-code-extensions",
     "engines": {
         "vscode": "^1.15.0"
     },
     "categories": [
         "Languages",
         "Linters",
         "Snippets"
     ],
+    "keywords": [
+        "C",
+        "C++",
+        "LSP",
+        "Clang",
+        "LLVM",
+        "Clangd"
+    ],
     "activationEvents": [
         "onLanguage:cpp",
         "onLanguage:c"
     ],
     "main": "./out/src/extension",
     "scripts": {
         "vscode:prepublish": "tsc -p ./",
         "compile": "tsc -watch -p ./",
         "postinstall": "node ./node_modules/vscode/bin/install",
         "test": "node ./node_modules/vscode/bin/test"
     },
     "dependencies": {
         "vscode-languageclient": "^3.3.0",
         "vscode-languageserver": "^3.3.0"
     },
     "devDependencies": {
         "typescript": "^2.0.3",
         "vscode": "^1.0.3",
         "mocha": "^2.3.3",
         "@types/node": "^6.0.40",
         "@types/mocha": "^2.2.32"
     },
+    "repository": {
+      "type": "git",
+      "url": "https://github.com/llvm-mirror/clang-tools-extra/tree/master/clangd/clients/clangd-vscode"
+    },
     "contributes": {
         "configuration": {
             "type": "object",
             "title": "clangd configuration",
             "properties": {
                 "clangd.path": {
                     "type": "string",
                     "default": "clangd",