Enhancement: Namespaces

[hanjoosten]

A long-awaited feature of Ampersand is that of having namespaces. In the discussions of the past, we found that having a module structure as Haskell has, would enable namespaces. I am going to attempt to implement modules in a Haskell way. This issue will be a placeholder for my thoughts along the way. I welcome discussion as well!

The work is being documented along the way: See here.