Typescript-backbone: add `compile` npm script

This is consistent with how other apps are doing compilation steps
and removes the need to install typescript locally.

examples/typescript-backbone/package.json

@@ -7,5 +7,11 @@
     "lodash": "^3.1.0",
     "todomvc-app-css": "^1.0.0",
     "todomvc-common": "^1.0.1"
+  },
+  "devDependencies": {
+    "typescript": "^1.4.0"
+  },
+  "scripts": {
+    "compile": "tsc js/app.ts"
   }
 }

examples/typescript-backbone/readme.md

@@ -39,12 +39,10 @@ This application uses TypeScript classes to create Backbone.js models and views,
 
 ## Running
 
-A standalone TypeScript compiler is available on NPM.
+To compile the TypeScript in this project, install the dependencies and run the `compile` script.
 
-	npm install -g typescript
-
-To compile the TypeScript in this project:
-
-	# from examples/typescript-backbone
-	tsc js/app.ts
-	open index.html
+```
+# from examples/typescript-backbone
+$ npm run compile
+$ open index.html
+```