Introduce browser compatibility in doc

Author: gmetais

tech_stack.html

@@ -17,6 +17,7 @@ <h2>Technology stack on the client side</h2>
 	<li><a href="http://html5boilerplate.com/" target="_blank">HTML5 Boilerplate</a></li>
 	<li><a href="http://getbootstrap.com/" target="_blank">Twitter Bootstrap</a></li>
 	<li><a href="http://angularjs.org/" target="_blank">AngularJS</a></li>
+	<li>Compatible with IE9+ and modern browser</li>
 	<li>Full internationalization support with <a href="https://github.com/angular-translate/angular-translate" target="_blank">Angular Translate</a></li>
 	<li>
 	Optional <a href="http://compass-style.org/" target="_blank">Compass</a> / Sass support for CSS design</li>