add better android app launch

A small change: I've "improved" (removed the Actionbar) the look of the app while launching (example below).

![](https://lh5.googleusercontent.com/-3Pspka2CHF8/Uv5iXkM9lkI/AAAAAAAAEjI/NGpj6cNwYAQ/w546-h553-no/smoothlaunch.gif)

So the app launch now looks somewhat more like this:

![](http://cyrilmottier.com/media/2013/01/android-app-launching-made-gorgeaous/launching_facebook.png)

Some further improvements would be the ability to create an own theme which could be used for a splash screen or like above to color the whole screen red ;).

Also done some refactoring on the manifest (now it looks pretty!)