Sort function

[brianhuffman]

Add sort and sortBy functions to the Cryptol prelude.

I decided to make the helper function insertBy into a local definition, because I didn't think we really needed it as a prelude function.

[brianhuffman]

Oh, I apparently need to update a bunch of expected test output files, since I added two new declarations to the prelude and now all the fresh-type-variable auto-generated names have different numbers on them.

[yav]

I am a bit concerned with this code as I think people look at the Cryptol library for examples of how to write Cryptol, and I really wouldn't encourage people to write in this style. I know that you have to do this sort of hackery with the tools we have at the moment, though.

I am fine with committing it, if you think it is useful, but also think that perhaps this should be delegated a primitive, where we can actually implement it efficiently, and if one day we are generating code, we can generate reasonable code for it.