chore(rtts_assert): Update README version for rtts

Author: davideast

README.md

@@ -4,5 +4,5 @@ The Angular 2 quickstart includes all of the dependencies for writing Angular 2
 
 The quickstart contains
  - Pre-built ES5 version of [Angular 2](https://www.npmjs.com/package/angular2) alpha-14
- - Pre-built ES5 version of [rtts-assert](https://www.npmjs.com/package/rtts-assert) alpha-14
+ - Pre-built ES5 version of [rtts-assert](https://www.npmjs.com/package/rtts-assert) alpha-7
  - The es6-shim, which includes Traceur, ES6 Module Loader, System, Zone, and Traceur options for meta-data annotations.