[jedisct1]

If a high-level API ever has to be changed, that will be libsodium 2.0.

In 12 years, libsodium never had any breaking API changes, even though I don't like the NaCl API much (especially usage of `unsigned long long` instead of `size_t` for sizes).

API stability is something I'm very committed to, in all my software. APIs can always be improved. But from a developer perspective, a suboptimal but stable API is far better than something that requires changes to all your applications every time the dependencies are updated.