Initial commit. Note: this is broken right now.

note

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+I am thinking for the syntax in nel.
+How can we have multiple arguments for something?
+It feels rather stupid allowing this really.
+It's not very clear, a list is a list in any case.
+So maybe we really should just have another
+substatement, and forget about powering up
+the abstracts, for now? ...?
+
+Well then... in that case.
+We only need to make sure scoping works.
+Which means, scopes inherit from eachother,
+and applying congruent bindings causes an error.
+I think.