Added ANI-1ccx model with a similar loader to Builtins. (#167)

* Added ANI-1ccx model with a similar loader to Builtins.

* Apply suggestions from code review
Co-Authored-By: LeanAndMean <40122815+LeanAndMean@users.noreply.github.com>

* Fixed linter errors.

torchani/resources/ani-1ccx_8x/train3/networks/ANN-H.nnf-l3.bparam

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torchani/resources/ani-1ccx_8x/train3/networks/ANN-H.nnf-l4.bparam

+k2
\ No newline at end of file

torchani/resources/ani-1ccx_8x/train3/networks/ANN-N.nnf-l4.bparam

+uj
\ No newline at end of file