Add CCOpt.{none,some}?

[favonia]

I have been wondering what design principles might apply regarding these functions from Stdlib.Option, as I seem to be able to argue from the both sides whether these trivial functions should be included in containers. On the one hand, these functions do not suffer from various legacy issues (throwing exceptions instead of returning result, not tail-recursive, etc.), and this would make migration from the standard library easier. On the other hand, one can simply write None for none and pure for some.

[c-cube]

I haven't followed closely, did the stdlib already add some/none? If so, we can add them, they really don't cost anything :)

[favonia]

Yes the standard library already have them.

[c-cube]

done in 25660ee