Fixing Eclipse project properties and ant build

Hello Jan,
Could you please verify my fix for issue #9 by 
- opening the android lib project in eclipse and seeing there are no build errors
- running the ant build script from the shell, verifying the lib gets properly generated and installed, and the framework starts properly
Let me know if there are any problems!

By the way, I've noticed the size of the newly created md2-android-lib.jar is 105K whereas the old one was 122K. Is the latest code for the md2-lib-android project checked-in?