Update README.md

README.md

@@ -1,7 +1,9 @@
 Getting Started With Development
 ---------------
 
-Requires [Android Studio](http://developer.android.com/sdk/installing/studio.html)
+Astrid is built with [the new Android build system](http://tools.android.com/tech-docs/new-build-system).
+
+You must install [Gradle](http://www.gradle.org/) and [Android Studio](http://developer.android.com/sdk/installing/studio.html). Eclipse is not yet supported by the new build system.
 
 To Do
 -----
@@ -9,6 +11,6 @@ To Do
 * DropBox
 * Widgets
 * Translation workflow
-* Remove dead code, old branches
+* Remove dead code
 * Remove unused resources and preferences
 * Fix warnings