chore(): update readme with goals and browser support.

README.md

@@ -2,3 +2,26 @@
 
 This is the home for the Angular team's Material Design components built on top of Angular 2.
 Things are in very early stages now- check back soon for more progress.
+
+## The goal of Angular Material
+Our goal is to build a set of high-quality UI components built with Angular 2 and TypeScript, 
+following the Material Design spec, that are consumable by both JavaScript and Dart. These 
+components will serve as an example of how to write Angular code following best practices.
+
+### What do we mean by "high-quality"?
+* Internationalized and accessible so that all users can use them.
+* Straightforward APIs that don't confuse developers.
+* Behave as expected across a wide variety of use-cases without bugs.
+* Behavior is well-tested with both unit and integration tests.
+* Customizable within the bounds of the Material Design specification.
+* Performance cost is minimized 
+* Code is clean and well-documented to serve as an example for Angular devs.
+
+## Browser and screen reader support
+Angular Material supports the most recent two versions of all major browsers: 
+Chrome (including Android), Firefox, Safari (including iOS), and IE11 / Edge
+
+We also aim for great user experience with the following screen readers:
+* NVDA and JAWS with IE / FF / Chrome (on Windows).
+* VoiceOver with Safari on iOS and Safari / Chrome on OSX.
+* TalkBack with Chrome on Android.