AndroidManifest: Prevent Landscape, minimum Android-version is now 11.
activity_startscreen: Changed layout, deleted some layoutstuff, added
some UI-elements (text/buttons)
values-de/strings.xml: added some german translation
values/strings.xml: added some universal textstuff
Change the theme to the Holo
Startscreen.java: added a little bit of functionality (ip-check)
IPAddressValidator: added