Updated readme.

README.md

@@ -1,5 +1,17 @@
-Building
+ensichat
 ========
+
+Instant messanger for Android that is fully decentralized. Messages are sent directly between
+devices via Bluetooth, without any central server. A simple flood-based routing is used for
+message propagation.
+
+<img src="graphics/screenshot_phone_1.png" alt="screenshot 1" width="200" />
+<img src="graphics/screenshot_phone_2.png" alt="screenshot 2" width="200" />
+<img src="graphics/screenshot_phone_3.png" alt="screenshot 3" width="200" />
+
+Building
+--------
+
 To create a debug apk, run `./gradlew assembleDebug`. Alternatively, you can use
 `.gradlew thinDebug` for a faster compile, but this requires Scala libraries installed
 with [Android-Scala-Installer](https://github.com/Arneball/Android-Scala-Installer) on your device.
@@ -7,6 +19,6 @@ with [Android-Scala-Installer](https://github.com/Arneball/Android-Scala-Install
 To create a release apk, run `./gradlew assembleRelease`.
 
 License
-=======
+-------
 
 All code is licensed under the [GPL](LICENSE), v3 or later.