Auto save on format for vscode. Update readme to suggest using vscode and clang-format. (#103)

* vscode settings

* add the extension info to the readme

* link to vscode extension

Author: Nikhil Thorat

.vscode/settings.json

@@ -13,6 +13,7 @@
   "files.trimTrailingWhitespace": true,
   "editor.tabSize": 2,
   "editor.insertSpaces": true,
+  "editor.formatOnSave": true,
   "files.insertFinalNewline": true,
   "editor.detectIndentation": false,
   "editor.wrappingIndent": "none",

README.md

@@ -74,6 +74,10 @@ $ cd deeplearnjs
 $ npm run prep # Installs node modules and bower components.
 ```
 
+We recommend using [Visual Studio Code](https://code.visualstudio.com/) for
+development. Make sure to install the `clang-format` command line tool as
+well as the [Clang-Format VSCode extension](https://marketplace.visualstudio.com/items?itemName=xaver.clang-format) for auto-formatting.
+
 To interactively develop any of the demos (e.g. `demos/nn-art/`):
 
 ```bash