[clean] remove unused background image
Revert "[clean] remove unused background image"

This reverts commit 4b7cddb683c60d844b1f155345b39f4892d82b7b.
Merge branch 'GregBe' of https://github.com/Marco-Meyer/TINF13AIBI-Kinect into GregBe
Kinect_Python_Module
Merge remote-tracking branch 'origin/master' into GregBe
slide and lose sound + timer

+ slide sound + timer
+ lose play
del stop sound

-stop sound
+-in p.mixer.sound.play
Bercehnung vom Schwerpunkt und von Bewegung :)=
Music and Sound

+ Background music
sound.py new method with volume
+slide and lose sounds are now playing correctly
Fixed Game-Over Screen
Save

Saves the Highscore if the program determines. (Does not work yet)
Save

Saves if GameOver. atexit does not work yet
Render Transition-Clips
Graphics changes
Graphics changes
fixed saving
-changed atexti (which cannot open new filehandles) to periodic threaded autosave
-fixed saving to pickle protocol 2 (Python 2 default)
-removed savegame from git tracking
-generalized File Exceptions and throw warning on unknown ones
Conflict Resolve
Merge remote-tracking branch 'origin/master'
Merge branch 'GraphicsGeneration'
delta_centroid
Fix for saving fix