Add some instances of isos of NTs

After    | File Name                             | Before
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0m18.09s | Category/Equality                     | 0m20.38s
0m11.79s | Comma/Duals                           | 0m12.04s
0m10.98s | Groupoid                              | 0m10.30s
0m09.08s | Comma/InducedFunctors                 | 0m09.19s
0m06.25s | SumPreCategory                        | 0m04.94s
0m05.61s | Category/Morphisms                    | 0m05.34s
0m05.00s | Groupoid/Duals                        | 0m04.84s
0m04.80s | Functor/Equality                      | 0m05.94s
0m04.12s | Groupoid/Functors                     | 0m03.94s
0m03.73s | UniversalProperties                   | 0m03.59s
0m02.96s | Grothendieck/ToSet                    | 0m03.06s
0m02.67s | BoolCategory                          | 0m02.78s
0m02.65s | NaturalTransformation/Duals           | 0m02.18s
0m02.59s | Comma/CommaCategory                   | 0m02.58s
0m02.12s | NaturalTransformation/Equality        | 0m02.15s
0m02.06s | Category/Product                      | 0m01.82s
0m02.02s | Hom                                   | 0m01.70s
0m01.70s | NaturalTransformation/Product         | 0m01.40s
0m01.64s | NaturalTransformation/Composition     | 0m01.60s
0m01.35s | Functor/Product                       | 0m01.58s
0m01.30s | NaturalTransformation/CompositionLaws | 0m01.28s
0m01.18s | FunctorCategory/Morphisms             | 0m00.97s
0m01.16s | NaturalTransformation/Isomorphisms    | 0m00.12s
0m00.66s | InitialTerminalCategory               | 0m00.75s
0m00.52s | Functor/CompositionLaws               | 0m00.51s
0m00.46s | Common                                | 0m00.48s
0m00.39s | Comma/Projection                      | 0m00.42s
0m00.38s | Discrete/Duals                        | 0m00.30s
0m00.36s | IndiscreteCategory                    | 0m00.38s
0m00.34s | FunctorCategory                       | 0m00.29s
0m00.33s | Cat                                   | 0m00.32s
0m00.32s | SetCategory                           | 0m00.36s
0m00.32s | Adjoint/UnitCounit                    | 0m00.31s
0m00.31s | NaturalTransformation/Identity        | 0m00.35s
0m00.30s | Functor/Composition                   | 0m00.32s
0m00.28s | Functor/Duals                         | 0m00.27s
0m00.26s | Category/Objects                      | 0m00.27s
0m00.23s | NaturalNumbersObject                  | 0m00.15s
0m00.22s | IsGroupoid                            | 0m00.24s
0m00.22s | NatCategory                           | 0m00.28s
0m00.22s | NaturalTransformation/Core            | 0m00.23s
0m00.18s | ComputableCat                         | 0m00.19s
0m00.16s | Category/Core                         | 0m00.20s
0m00.16s | Category/Duals                        | 0m00.16s
0m00.15s | NatCategory/Duals                     | 0m00.16s
0m00.13s | Utf8                                  | 0m00.12s
0m00.13s | Peano                                 | 0m00.13s
0m00.12s | Category/Category                     | 0m00.12s
0m00.12s | Functor                               | 0m00.09s
0m00.12s | Functor/Core                          | 0m00.12s
0m00.12s | Grothendieck                          | 0m00.10s
0m00.11s | Functor/Identity                      | 0m00.13s
0m00.11s | Category/StrictCategory               | 0m00.10s
0m00.10s | NaturalTransformation                 | 0m00.15s
0m00.09s | DiscreteCategory                      | 0m00.12s
0m00.07s | Notations                             | 0m00.07s
0m00.05s | NotationsUtf8                         | 0m00.04s
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1m52.89s | Total                                 | 1m51.94s