Remove generated files

These are in the gitignore, yet included in the tree.
Compiled packages can be add manually, but this should proabbly be
removed for the sake of being able to move this code around different
build environments.
Include pre-generated build.xml

This should work with ant & the android sdk, if setup correctly.
Add ant.properties

Sets appropriate java target for building Atraci (requires jdk7).
Without this, the default javac settings will fail when building
using ant.
Merge pull request #7 from SyNtheticNightmar3/next

Clean up generated files & changes for ant