Document that TypeScript should be installed separately

ivogabe · ivogabe · commit 8d7d49db4151 · 2016-09-24T22:56:27.000+02:00
diff --git a/readme.md b/readme.md
@@ -24,9 +24,9 @@ npm install --global gulp
 ```shell
 npm install gulp
 ```
-##### 3. Install gulp-typescript
+##### 3. Install gulp-typescript & TypeScript
 ```shell
-npm install gulp-typescript
+npm install gulp-typescript typescript
 ```
 
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