Update development documentation for vendoring

This commit updates the development documentation to add the Language Server
vendoring step when developing on the client.  Without this, the extension fails
to launch the server.

Author: glennsarti

README.md

@@ -23,28 +23,41 @@ Follow the instructions in the server documentation - [How to run the Language S
 
 * Clone this repository
 
-```
+```bash
 > git clone https://github.com/jpogran/puppet-vscode.git
 
 > cd puppet-vscode
 > cd client
 ```
 
-* Install the node modules and start VS Code
+* Install the node modules
 
-```
-> npm install
+```bash
+client > npm install
 ...
 
 > puppet-vscode@0.0.3 postinstall C:\Source\puppet-vscode\client
 > node ./node_modules/vscode/bin/install
-
+...
 Detected VS Code engine version: ^1.10.0
 Found minimal version that qualifies engine range: 1.10.0
 Fetching vscode.d.ts from: https://raw.githubusercontent.com/Microsoft/vscode/1.10.0/src/vs/vscode.d.ts
 vscode.d.ts successfully installed!
+```
+
+* Copy the Language Server for vendoring into the extensions
+
+```bash
+client > node node_modules/gulp/bin/gulp.js copy_language_server
+[15:13:02] Using gulpfile client/gulpfile.js
+[15:13:02] Starting 'copy_language_server'...
+[15:13:02] Finished 'copy_language_server' after 193 ms
+```
+
+* Start VS Code
 
-> code .
+```bash
+client > code .
 ```
 
 * Once VS Code is running, press `F5` to start a build and a new VS Code development instance should start