rename non-cycling imports to 'from jedi import ..'

jedi/common.py

@@ -4,9 +4,9 @@ import contextlib
 import functools
 import tokenize
 
-from _compatibility import next, reraise
-import debug
-import settings
+from jedi._compatibility import next, reraise
+from jedi import debug
+from jedi import settings
 
 
 class MultiLevelStopIteration(Exception):