API to version 11. API below 5 not supported any more.
Terget now SDK 19 (Android 4.4), removed further compatibility for SDK < 5
minSDK to 7, in preperation for Holo
Changed the way how SDK_INT is resolved.
targetSDK v10, so the softkey menu replacement will still be displayed, will replace this with an actionbar later.
Reorganize AndroidManifest.xml, according to LINT hints
Switched notifications to use the new Builder and to look prettier on newer Android versions.
Also set the Priority of the persistent Notification to PRIORITY_MIN, so that it doesn't show up in the status bar on Android SDK >= 16.