Add construction of various exponential laws

Unfortunately, they're rather slow.  Additionally, the actual laws (that
the constructed functors are inverses) still need to be proven.  I fear
that these might be even slower.

After    | File Name                                              | Before
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3m03.45s | Total                                                  | 2m23.05s
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0m17.12s | categories/ExponentialLaws/Law4/Functors               |   N/A
0m16.32s | categories/Functor/Paths                               | 0m16.19s
0m14.67s | categories/ExponentialLaws/Law1/Law                    |   N/A
0m13.00s | hit/Flattening                                         | 0m12.92s
0m09.66s | categories/Functor/Pointwise/Properties                | 0m09.94s
0m08.14s | categories/GroupoidCategory/Morphisms                  | 0m07.83s
0m07.50s | hit/Connectedness                                      | 0m07.98s
0m07.30s | categories/Functor/Prod/Universal                      | 0m07.09s
0m06.13s | categories/Functor/Sum                                 | 0m06.09s
0m05.58s | categories/Category/Morphisms                          | 0m05.51s
0m05.10s | categories/ExponentialLaws/Law2/Functors               |   N/A
0m05.03s | EquivalenceVarieties                                   | 0m05.35s
0m04.34s | categories/Category/Sigma/OnMorphisms                  | 0m04.33s
0m03.53s | types/ObjectClassifier                                 | 0m03.95s
0m03.01s | types/Sigma                                            | 0m02.84s
0m02.94s | categories/Functor/Prod/Functorial                     | 0m02.82s
0m02.61s | Equivalences                                           | 0m02.56s
0m02.32s | categories/Functor/Attributes                          | 0m02.16s
0m02.14s | categories/Category/Sum                                | 0m02.18s
0m02.13s | categories/Category/Sigma/Core                         | 0m02.14s
0m02.03s | categories/NaturalTransformation/Dual                  | 0m02.36s
0m02.01s | PathGroupoids                                          | 0m01.96s
0m01.79s | categories/HomFunctor                                  | 0m01.73s
0m01.72s | categories/FunctorCategory/Morphisms                   | 0m01.69s
0m01.67s | categories/NaturalTransformation/CompositionLaws       | 0m01.60s
0m01.65s | categories/NaturalTransformation/Paths                 | 0m01.64s
0m01.51s | categories/Category/Sigma/OnObjects                    | 0m01.68s
0m01.40s | categories/ExponentialLaws/Law  N/A                    |   N/A
0m01.32s | types/Prod                                             | 0m01.27s
0m01.28s | categories/Category/Prod                               | 0m01.32s
0m01.19s | categories/NaturalTransformation/Composition           | 0m01.19s
0m01.08s | categories/ExponentialLaws/Law1/Functors               |   N/A
0m01.05s | categories/Functor/Pointwise                           | 0m01.10s
0m01.02s | categories/NaturalTransformation/Prod                  | 0m00.98s
0m00.98s | categories/Functor/Prod                                | 0m01.24s
0m00.92s | hit/Spheres                                            | 0m00.95s
0m00.90s | hit/epi                                                | 0m00.92s
0m00.82s | types/Paths                                            | 0m00.81s
0m00.80s | Trunc                                                  | 0m00.81s
0m00.70s | categories/InitialTerminalCategory                     | 0m00.76s
0m00.64s | types/Universe                                         | 0m00.67s
0m00.60s | hit/quotient                                           | 0m00.57s
0m00.56s | types/Sum                                              | 0m00.58s
0m00.53s | Functorish                                             | 0m00.54s
0m00.52s | categories/NaturalTransformation/Sum                   | 0m00.51s
0m00.51s | hit/Suspension                                         | 0m00.49s
0m00.49s | types/Record                                           | 0m00.46s
0m00.46s | hit/Circle                                             | 0m00.48s
0m00.46s | categories/Functor/CompositionLaws                     | 0m00.46s
0m00.43s | Tactics                                                | 0m00.41s
0m00.42s | HProp                                                  | 0m00.40s
0m00.42s | types/Forall                                           | 0m00.43s
0m00.40s | categories/ExponentialLaws/Law3/Functors               |   N/A
0m00.40s | categories/categories                                  | 0m00.30s
0m00.38s | HSet                                                   | 0m00.37s
0m00.36s | categories/Cat/Core                                    | 0m00.44s
0m00.36s | Fibrations                                             | 0m00.34s
0m00.31s | categories/Functor/Functor                             | 0m00.35s
0m00.29s | TruncType                                              | 0m00.30s
0m00.29s | categories/NaturalTransformation/Identity              | 0m00.26s
0m00.28s | categories/IndiscreteCategory                          | 0m00.25s
0m00.26s | Misc                                                   | 0m00.26s
0m00.26s | categories/Cat/Morphisms                               | 0m00.33s
0m00.25s | categories/Functor/Dual                                | 0m00.26s
0m00.25s | hit/minus1Trunc                                        | 0m00.24s
0m00.24s | categories/Category/Objects                            | 0m00.22s
0m00.24s | types/Arrow                                            | 0m00.25s
0m00.21s | categories/ExponentialLaws/ExponentialLaws             |   N/A
0m00.20s | Conjugation                                            | 0m00.17s
0m00.20s | categories/SetCategory/Functors/Functors               | 0m00.17s
0m00.20s | categories/NatCategory                                 | 0m00.16s
0m00.20s | categories/Functor/Composition                         | 0m00.23s
0m00.19s | hit/iso                                                | 0m00.18s
0m00.18s | hit/unique_choice                                      | 0m00.15s
0m00.18s | categories/FunctorCategory/Core                        | 0m00.16s
0m00.17s | categories/Category/Category                           | 0m00.13s
0m00.17s | categories/Category/Core                               | 0m00.14s
0m00.16s | categories/Functor/Prod/Prod                           | 0m00.14s
0m00.16s | categories/GroupoidCategory/Core                       | 0m00.18s
0m00.16s | FunextVarieties                                        | 0m00.16s
0m00.15s | categories/Cat/Cat                                     | 0m00.11s
0m00.14s | categories/SetCategory/Core                            | 0m00.14s
0m00.14s | categories/Utf8                                        | 0m00.13s
0m00.14s | categories/Profunctor/Identity                         | 0m00.10s
0m00.14s | categories/Profunctor/Representable                    | 0m00.11s
0m00.13s | categories/Profunctor/Core                             | 0m00.09s
0m00.13s | categories/Category/Dual                               | 0m00.14s
0m00.13s | categories/ExponentialLaws/Law2/Law                    |   N/A
0m00.13s | categories/ExponentialLaws/Law1/Law1                   |   N/A
0m00.13s | categories/ExponentialLaws/Law2/Law2                   |   N/A
0m00.13s | Overture                                               | 0m00.14s
0m00.12s | categories/Category/Utf8                               | 0m00.13s
0m00.12s | categories/NaturalTransformation/NaturalTransformation | 0m00.14s
0m00.12s | categories/NaturalTransformation/Notations             | 0m00.14s
0m00.12s | hit/Interval                                           | 0m00.11s
0m00.12s | categories/Functor/Notations                           | 0m00.09s
0m00.12s | categories/Notations                                   | 0m00.12s
0m00.12s | categories/Category/Notations                          | 0m00.09s
0m00.12s | categories/Category/Sigma/Sigma                        | 0m00.12s
0m00.12s | categories/NaturalTransformation/Utf8                  | 0m00.08s
0m00.11s | categories/DiscreteCategory                            | 0m00.10s
0m00.11s | categories/ExponentialLaws/Law3/Law                    |   N/A
0m00.11s | categories/Profunctor/Notations                        | 0m00.10s
0m00.11s | coq/Init/Peano                                         | 0m00.11s
0m00.11s | HoTT                                                   | 0m00.09s
0m00.11s | categories/NaturalTransformation/Core                  | 0m00.12s
0m00.11s | categories/Profunctor/Utf8                             | 0m00.11s
0m00.10s | categories/ExponentialLaws/Law3/Law3                   |   N/A
0m00.10s | categories/GroupoidCategory/GroupoidCategory           | 0m00.10s
0m00.10s | categories/FunctorCategory/Utf8                        | 0m00.10s
0m00.10s | Contractible                                           | 0m00.10s
0m00.10s | categories/Category/Strict                             | 0m00.06s
0m00.10s | categories/ExponentialLaws/Law1                        |   N/A
0m00.10s | categories/ExponentialLaws/Law4/Law4                   |   N/A
0m00.10s | categories/Category/Univalent                          | 0m00.08s
0m00.10s | categories/Category/Subcategory/Wide                   | 0m00.09s
0m00.10s | types/Bool                                             | 0m00.14s
0m00.10s | categories/SetCategory/SetCategory                     | 0m00.10s
0m00.10s | types/Unit                                             | 0m00.12s
0m00.10s | hit/Truncations                                        | 0m00.09s
0m00.09s | categories/ExponentialLaws/Law4/Law                    |   N/A
0m00.09s | coq/Init/Specif                                        | 0m00.08s
0m00.09s | categories/Functor/Core                                | 0m00.09s
0m00.09s | categories/Functor/Utf8                                | 0m00.11s
0m00.09s | categories/FunctorCategory/Notations                   | 0m00.11s
0m00.08s | categories/FunctorCategory/FunctorCategory             | 0m00.12s
0m00.08s | categories/Category/Subcategory/Subcategory            | 0m00.07s
0m00.08s | categories/Functor/Pointwise/Pointwise                 | 0m00.09s
0m00.07s | categories/Profunctor/Profunctor                       | 0m00.10s
0m00.07s | UnivalenceAxiom                                        | 0m00.09s
0m00.07s | categories/Category/Subcategory/Full                   | 0m00.07s
0m00.07s | FunextAxiom                                            | 0m00.05s
0m00.06s | coq/Init/Datatypes                                     | 0m00.05s
0m00.06s | coq/Init/Logic_Type                                    | 0m00.05s
0m00.06s | types/Empty                                            | 0m00.08s
0m00.05s | categories/Functor/Identity                            | 0m00.06s
0m00.05s | coq/Program/Tactics                                    | 0m00.06s
0m00.04s | coq/Init/Logic                                         | 0m00.02s
0m00.04s | coq/Init/Prelude                                       | 0m00.04s
0m00.03s | coq/Init/Notations                                     | 0m00.02s
0m00.03s | coq/Bool/Bool                                          | 0m00.03s
0m00.03s | coq/Init/Tactics                                       | 0m00.04s