message: Implement additive traits up to group
diff: @@ -1016,6 +1016,12 @@ mod alga_impls {
  }
  }
  + impl<N: Copy + Num + Neg<Output=N>, I: SpIndex> AbstractQuasigroup<Additive> for CsVecI<N, I> {}
  +
  + impl<N: Copy + Num + Neg<Output=N>, I: SpIndex> AbstractLoop<Additive> for CsVecI<N, I> {}
  +
  + impl<N: Copy + Num + Neg<Output=N>, I: SpIndex> AbstractGroup<Additive> for CsVecI<N, I> {}
  +
  #[cfg(test)]
  mod test {
  use super::*;
  