/+junk/invaders_vala

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bzr branch http://gegoxaren.bato24.eu/bzr/%2Bjunk/invaders_vala 
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public struct invadersGame.MovementDelta {
  float x;
  float y;
  
  public string to_string() {
    return "x:" + x.to_string() + "  y:" + y.to_string();
  }
}