compose is missing a definition

[adam-antonik]

a . b is parsed as compose(a, b), but that compose is not defined in the std lib.

[adam-antonik]

I should add that I've currently got compose as a member of a typeclass, which is nice as I can use it for function composition as I suppose it was intended, but also for dot-product of arrays.

[kthielen]

Hmm, maybe better if we leave this undefined then, heh.

[adam-antonik]

And we probably don't need both of mmap and mapm.

[kthielen]

I'd like to remove "mmap" since it's an unfortunate overload with libc mmap. I didn't add that definition myself, so I have to figure out where this is actually used so I can change it.