Add a tactic for shuffling isos around

After    | File Name                             | Before
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1m37.15s | Adjoint/Hom                           | 1m36.37s
0m20.40s | Category/Equality                     | 0m20.58s
0m10.55s | Comma/Duals                           | 0m11.26s
0m08.53s | Comma/InducedFunctors                 | 0m07.72s
0m07.16s | Groupoid                              | 0m08.48s
0m05.60s | Category/Morphisms                    | 0m06.02s
0m04.74s | SumPreCategory                        | 0m05.58s
0m04.10s | Groupoid/Duals                        | 0m04.42s
0m03.96s | Functor/Equality                      | 0m04.48s
0m03.80s | Groupoid/Functors                     | 0m03.39s
0m03.31s | UniversalProperties                   | 0m03.24s
0m02.74s | Grothendieck/ToSet                    | 0m03.04s
0m02.60s | BoolCategory                          | 0m02.69s
0m02.30s | Comma/CommaCategory                   | 0m02.51s
0m01.90s | Category/Product                      | 0m02.06s
0m01.88s | NaturalTransformation/Equality        | 0m01.99s
0m01.78s | NaturalTransformation/Duals           | 0m02.67s
0m01.62s | Hom                                   | 0m01.82s
0m01.41s | NaturalTransformation/Product         | 0m01.29s
0m01.31s | NaturalTransformation/Composition     | 0m01.39s
0m01.24s | NaturalTransformation/CompositionLaws | 0m01.36s
0m01.15s | Functor/Product                       | 0m01.24s
0m01.07s | NaturalTransformation/Isomorphisms    | 0m01.02s
0m00.72s | Cat/Morphisms                         | 0m00.76s
0m00.66s | FunctorCategory/Morphisms             | 0m00.94s
0m00.60s | InitialTerminalCategory               | 0m00.60s
0m00.42s | Functor/CompositionLaws               | 0m00.48s
0m00.39s | Comma/Projection                      | 0m00.41s
0m00.35s | NaturalTransformation/Identity        | 0m00.35s
0m00.34s | IndiscreteCategory                    | 0m00.41s
0m00.34s | SetCategory                           | 0m00.32s
0m00.33s | Discrete/Duals                        | 0m00.36s
0m00.32s | Common                                | 0m00.30s
0m00.28s | Adjoint/UnitCounit                    | 0m00.30s
0m00.27s | Category/Objects                      | 0m00.23s
0m00.27s | Cat                                   | 0m00.28s
0m00.27s | FunctorCategory                       | 0m00.30s
0m00.26s | Functor/Composition                   | 0m00.26s
0m00.23s | ComputableCat                         | 0m00.19s
0m00.22s | Functor/Duals                         | 0m00.32s
0m00.22s | NatCategory                           | 0m00.22s
0m00.20s | Category/Core                         | 0m00.19s
0m00.20s | IsGroupoid                            | 0m00.20s
0m00.16s | Adjoint                               | 0m00.16s
0m00.16s | NaturalNumbersObject                  | 0m00.20s
0m00.15s | NatCategory/Duals                     | 0m00.16s
0m00.14s | Category/Duals                        | 0m00.19s
0m00.13s | Functor/Core                          | 0m00.13s
0m00.13s | NaturalTransformation/Core            | 0m00.16s
0m00.12s | Category/UnivalentCategory            | 0m00.10s
0m00.12s | Peano                                 | 0m00.12s
0m00.11s | NaturalTransformation                 | 0m00.11s
0m00.11s | Grothendieck                          | 0m00.12s
0m00.09s | Functor                               | 0m00.10s
0m00.09s | DiscreteCategory                      | 0m00.09s
0m00.08s | Category                              | 0m00.08s
0m00.08s | Functor/Identity                      | 0m00.09s
0m00.08s | Utf8                                  | 0m00.11s
0m00.07s | Category/StrictCategory               | 0m00.08s
0m00.06s | Notations                             | 0m00.05s
0m00.04s | NotationsUtf8                         | 0m00.05s
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3m19.11s | Total                                 | 3m24.13s