Removed some errant *~ files
Merge pull request #44 from stefanbeller/master

Make Polymorphable international: German translation available!
Add a .gitattributes file

This makes releasing tar balls easier, as it automatically will ignore
unneeded files for the release (tiled and art_src folder and the
dot git files)

Signed-off-by: Stefan Beller <stefanbeller@googlemail.com>