preserve order of creation

[errordeveloper]

Some object, like namespace (which kubegen doesn't actually support directly), need to be created before other objects that reference them. A solution of some kind is needed. It's easy with lists, as they can be sorted, but for files it's uncertain. Oder should be idepotant for all other object, but perhaps this assumption should to be double-checked.

[errordeveloper]

An easy fix would be to filter namespaces up the list when we flatten lists, so at least it is usable in stdout version.