Merge pull request #5 from browserstack/readme-update

Updated README with link to Parallel Test Calculator

Author: sinstein

README.md

@@ -11,8 +11,10 @@
 
 ## Running your tests
 - To run a single test, run `npm run single`
-- To run parallel tests, run `npm run parallel`
 - To run local tests, run `npm run local`
+- To run parallel tests, run `npm run parallel`
+
+ Understand how many parallel sessions you need by using our [Parallel Test Calculator](https://www.browserstack.com/automate/parallel-calculator?ref=github)
 
 ## Notes
 * You can view your test results on the [BrowserStack automate dashboard](https://www.browserstack.com/automate)