Fixed classpath errors at runtime (NoClassDefFoundError).
They should now be really fixed without manual changes after cloning the repo. The .classpath from #45 did not work for me. Hope this one does for all.
Updated target sdk to 18.
The different targets in AndroidManifest.xml and project.properties were causing some problems when adding code from newer APIs, so they are now set to the same value.
Added screenSize to configChanges in the manifest.
Fixes issue #42 (Orientation changes lead to activity restarting on API 13+)