[Apps] Decorate android app article #200 (#225)

* Apps: Decorate the smartphone apps articles, issue #200

Signed-off-by: Christian Hailer <christian@hailer.eu>

* Update android.md

Signed-off-by: Thomas Dietrich <thomas.dietrich@tu-ilmenau.de> (github: ThomDietrich)

addons/uis/apps/android.md

@@ -9,17 +9,23 @@ title: Android openHAB App
 
 We provide a native Android app for openHAB.
 It uses the REST API of openHAB to render sitemaps of your openHAB installation.
-It also supports [my.openhab.org]() including push notifications.
+It also supports [myopenhab.org](http://www.myopenhab.org) including push notifications.
 The latest release version of the app is always available through Google Play.
 
-<!-- Did not work:
-[![Download openHAB app on Google Play](images/google-play-badge.png)](https://play.google.com/store/apps/details?id=org.openhab.habdroid)
--->
+**Features:**
 
-<a href="https://play.google.com/store/apps/details?id=org.openhab.habdroid">
-  <img alt="'Get the openHAB app on Google Play" src="https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png" style="width: 50%; height: 50%"/>
-</a>
+* View openHAB sitemaps
+* Control openHAB remotely
+* Multiple themes available
+* Push notifications
+* Voice commands
+* Thing discovery via app
+* Support for Username/password or SSL client authentication
+* Selection of a default sitemap
+
+[![Download openHAB app on Google Play](images/google-play-badge.png){:width="250px"}](https://play.google.com/store/apps/details?id=org.openhab.habdroid)
+
+![](images/android_01.png){:width="25%"} ![](images/android_02.png){:width="25%"}
 
 Please refer to the [openhab.android project](https://github.com/openhab/openhab.android) on GitHub for more technical details.
 
-{% include contribution-wanted.html %}