Relative imports should be working again even when used in more special occasions. Fixes #973

There are more fixes needed. Some things are just very unclean and might lead to further bugs.

test/completion/__init__.py

@@ -4,6 +4,5 @@ some_variable = 1
 
 
 from . import imports
-# TODO this is not correct
-#? 
+#? int()
 imports.relative()