namespaces

[cburgard]

It has been brought up multiple times already (e.g. in #10 ) that it would be extremely useful to support namespaces for function and parameter names.

From what I can see, many people would like a syntax like namespace::name, which I personally also like (coming from the C++-world).

I think we should not enforce the usage of a namespace, but rather allow tooling to, upon import, append a namespace to all names in a specific file, which will make combinations much more explicit.

One important point here is if we want to support nested namespaces.

This has some interplay with #12 .