Do some reorginization
Update isomorphisms a bit
Add SetCategory

After    | File Name                             | Before
-----------------------------------------------------------
1m42.92s | Category/Equality                     | 1m40.45s
0m20.29s | Functor/Equality                      | 0m19.54s
0m12.86s | NaturalTransformation/Equality        | 0m13.04s
0m07.27s | Category/Morphisms                    | 0m07.47s
0m02.20s | NaturalTransformation/Composition     | 0m02.26s
0m02.07s | Functor/CompositionLaws               | 0m02.21s
0m01.87s | SumPreCategory                        | 0m01.86s
0m01.78s | ProductPreCategory                    | 0m01.81s
0m01.38s | NaturalTransformation/CompositionLaws | 0m01.38s
0m00.85s | BoolCategory                          | 0m00.82s
0m00.58s | SetCategory                           |   N/A
0m00.29s | NaturalTransformation/Identity        | 0m00.27s
0m00.24s | Common                                | 0m00.21s
0m00.23s | Functor/Composition                   | 0m00.22s
0m00.22s | FunctorPreCategory                    | 0m00.24s
0m00.17s | Category/Core                         | 0m00.16s
0m00.13s | Functor/Core                          | 0m00.12s
0m00.13s | DiscretePreCategory                   | 0m00.14s
0m00.13s | NaturalTransformation/Core            | 0m00.12s
0m00.10s | Category/StrictCategory               | 0m00.08s
0m00.10s | Functor                               | 0m00.09s
0m00.09s | NaturalTransformation                 | 0m00.09s
0m00.09s | Utf8                                  | 0m00.09s
0m00.09s | Category/Category                     | 0m00.09s
0m00.09s | Peano                                 | 0m00.12s
0m00.08s | Functor/Identity                      | 0m00.07s
0m00.04s | NotationsUtf8                         | 0m00.04s
0m00.04s | Notations                             | 0m00.05s
-----------------------------------------------------------
2m36.33s | Total                                 | 2m33.04s
Add Groupoid, rename DiscretePreCategory

After    | File Name                             | Before
-----------------------------------------------------------
1m43.06s | Category/Equality                     | 1m44.02s
0m22.15s | Functor/Equality                      | 0m19.72s
0m14.79s | NaturalTransformation/Equality        | 0m13.00s
0m07.22s | Category/Morphisms                    | 0m07.40s
0m02.29s | NaturalTransformation/Composition     | 0m02.36s
0m02.21s | Functor/CompositionLaws               | 0m02.07s
0m01.88s | ProductPreCategory                    | 0m01.74s
0m01.85s | SumPreCategory                        | 0m01.76s
0m01.41s | NaturalTransformation/CompositionLaws | 0m01.42s
0m00.88s | BoolCategory                          | 0m00.83s
0m00.49s | SetCategory                           | 0m00.08s
0m00.28s | NaturalTransformation/Identity        | 0m00.26s
0m00.24s | FunctorPreCategory                    | 0m00.24s
0m00.24s | Functor/Composition                   | 0m00.24s
0m00.23s | Common                                | 0m00.19s
0m00.16s | Category/Core                         | 0m00.17s
0m00.15s | NaturalTransformation/Core            | 0m00.13s
0m00.14s | Peano                                 | 0m00.13s
  N/A    | DiscretePreCategory                   | 0m00.12s
0m00.10s | Functor/Core                          | 0m00.14s
0m00.09s | NaturalTransformation                 | 0m00.10s
0m00.09s | Category/StrictCategory               | 0m00.10s
0m00.09s | Functor                               | 0m00.08s
0m00.08s | Utf8                                  | 0m00.09s
0m00.08s | Category/Category                     | 0m00.09s
0m00.06s | Functor/Identity                      | 0m00.10s
0m00.06s | NotationsUtf8                         | 0m00.03s
0m00.04s | Notations                             | 0m00.03s
0m00.03s | Groupoid                              |   N/A
-----------------------------------------------------------
2m40.38s | Total                                 | 2m36.64s