Switch back to matklad.rust-analyzer and update the documentation

Author: mattetti

.devcontainer/devcontainer.json

@@ -1,19 +1,18 @@
 {
-    "name": "Codespaces Rust Starter",
-    "extensions": [
-        "ms-vsliveshare.vsliveshare",
-	"matklad.rust-analyzer",
-	"serayuzgur.crates",
-        "vadimcn.vscode-lldb",
-        "rust-lang.rust"
-    ],
-    "dockerFile": "Dockerfile",
-    "settings": {
-	"editor.formatOnSave": true,
-        "terminal.integrated.shell.linux": "/usr/bin/zsh",
-        "files.exclude": {
-            "**/CODE_OF_CONDUCT.md": true,
-            "**/LICENSE": true
-        }
-    }
-}
+	"name": "Codespaces Rust Starter",
+	"extensions": [
+		"ms-vsliveshare.vsliveshare",
+		"matklad.rust-analyzer",
+		"serayuzgur.crates",
+		"vadimcn.vscode-lldb"
+	],
+	"dockerFile": "Dockerfile",
+	"settings": {
+		"editor.formatOnSave": true,
+		"terminal.integrated.shell.linux": "/usr/bin/zsh",
+		"files.exclude": {
+			"**/CODE_OF_CONDUCT.md": true,
+			"**/LICENSE": true
+		}
+	}
+}

README.md

@@ -95,8 +95,8 @@ To load this setup in a container, we need to point to it. We have many options
 2. Choose  `Remote-Containers: Open Repository in container`
 3. Type `codespaces-examples/rust` in the prompt.
 4. Chose to create a unique volume.
-5. Wait until the container is setup and you are connected to it, at this point, it should ask you to install some missing Rust components, go ahead and say yes.
-![](https://user-images.githubusercontent.com/113/84210352-468ca100-aa6d-11ea-88c4-fdffa1b9e92a.png)
+5. Wait until the container is setup and you are connected to it, at this point, it should ask you to install the Language server for the rust-analyzer, go ahead and click "Download now".
+![](https://user-images.githubusercontent.com/113/84297926-2ad3da00-ab03-11ea-8045-690eb0763d9f.png)
 
 That's it, you are all setup, you can modify and run the code in your local VSCode instance but the code and extensions will run in your container.