say what the engine is (#3029)
* say what the engine is
closes https://github.com/flutter/flutter/issues/289
* Update README.md
diff --git a/README.md b/README.md
index 8dbf439..7370a1e 100644
--- a/README.md
+++ b/README.md
@@ -6,13 +6,17 @@
Flutter is optimized for today's, and tomorrow's, mobile devices. We are
focused on low-latency input and high frame rates on Android and iOS.
-_Flutter is an early-stage open-source project._ We are still missing core
-features like accessibility, text input, localization, and more. However,
+The Flutter Engine is the runtime environment for hosting Flutter applications.
+Most developers will interact with Flutter via the Flutter Framework and APIs,
+which run inside the engine.
+
+_Flutter is an early-stage open-source project._ We are still adding
+features. However,
you can build demos and examples today. We hope you try it out and send
us [feedback](mailto:flutter-dev@googlegroups.com).
- For information about using Flutter to build apps, please see
- the [getting started guide](http://flutter.io/getting-started/).
+ the [getting started guide](https://flutter.io/getting-started/).
- For information about contributing to the Flutter framework, please see
[the main Flutter repository](https://github.com/flutter/flutter/blob/master/CONTRIBUTING.md).
