Discourage relative imports.

pep-0008.txt

@@ -156,8 +156,9 @@ Imports
 
     - Relative imports for intra-package imports are highly discouraged.
       Always use the absolute package path for all imports.
-      (However, once PEP 328 [7] is fully implemented, its style of
-      explicit relative imports will be recommended.)
+      Even now that PEP 328 [7] is fully implemented in Python 2.5,
+      its style of explicit relative imports is actively discouraged;
+      absolute imports are more portable and usually more readable.
 
     - When importing a class from a class-containing module, it's usually okay
       to spell this