support local imports

tests/samples/local_import_action.py

@@ -0,0 +1,10 @@
+from .x import y
+from ..z import t
+from ...t import a
+from .x import y, hakan
+from ..z import u, b
+from ...t import z, q
+
+hakan
+b
+q()

tests/samples/local_import_expected.py

@@ -0,0 +1,7 @@
+from .x import hakan
+from ..z import b
+from ...t import q
+
+hakan
+b
+q()

unimport/refactor.py

@@ -21,12 +21,13 @@ def traverse_imports(names):
 
 
 class RefactorImports(BaseFix):
+
     PATTERN = r"""
         simple_stmt<
             (
                 import_name< 'import' imp=any >
                 |
-                import_from< 'from' imp=any 'import' ['('] items=any [')'] >
+                import_from< 'from' imp=['.'*] any 'import' ['('] items=any [')'] >
             ) '\n'
         >
     """