Add npm info to getting started doc.

Author: yanarchy

docs/00-Getting-Started.md

@@ -31,6 +31,12 @@ You can also grab Chart.js using bower:
 bower install Chart.js --save
 ```
 
+or NPM:
+
+```bash
+npm install chart.js --save
+```
+
 Also, Chart.js is available from CDN:
 
 https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.min.js