[nem-en] Completion thoughts

[Kamil Skalski]

>
> Also classes subtyping changed one. But in general it is now possible
> to just remove the program nodes and leave all information about
> external types intact. This is how Options.PersistentLibraries work.
> I will try to enable it in CompletionEngine.

Ok, I commited the change. Could someone verify that it works properly
in MonoDevelop?

The other optimization would be not to remove all TypeBuilders
(created types in scope of current program), but for example just from
the current file, etc. But this seems hard in case of
subtyping / partial types... we would need to remove type with its
subtypes and reanalyze all removed stuff (which can be distributed
among many files / locations).

-- 
Kamil Skalski
http://nazgul.omega.pl