Remove code committed by mistake with the big overhaul 908addd
Trick to enable importing NaiveLevel3

One can use the trait as before

    class AlgoUsingBlas3 extends BLAS.NaiveLevel3

but one can now also do

    import BLAS.NaiveLevel3
Faster matrix multiplication using blocking (wip)

Current issues:
  1. the management of the block and panel sizes with
     object FastLevel3Blocking needs work as different architectures
     need different values for mc, kc, mr, nr, etc.
  2. GEBP.apply is nearly a factor 2 slower than what it could be
More exhaustive samples to test matrix multiplication
Random seed for matrix multiplication testing
Enable benchmarking rectangular matrix multiplication
Factor some method access out of the loops