Add Exercise: Protein Translation

[D3usXMachina]

Adds the protein translation exercise (discussed here).

Also adds the required assert_equal for arrays of strings to the testlib (discussed here).

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[ErikSchierboom]

LGTM. I'll let some from the @exercism/fortran maintainers team look at the Fortran-specific side of things.

[ErikSchierboom]

@D3usXMachina If no one has reviewed in a couple of days, please ping me.

[ErikSchierboom]

The test runner has been updated!