fix install instruction

adrai · adrai · commit 9653e5e10431 · 2016-01-15T18:15:43.000+01:00
diff --git a/README.md b/README.md
@@ -18,7 +18,7 @@ On your page you need to include raphael like so:
 or
 
 ```node.js
-npm install flowchart
+npm install flowchart.js
 ```
 
 and then
