Split --raw-logs into --no-pretty and --no-log options.

--no-log: don't capture logs or run redo-log (same as pre-redo-log redo)
  --no-pretty: don't pretty-print logs, print @@REDO lines.

The latter is an option to both redo and redo-log.

redo-ifchange.py

@@ -21,7 +21,7 @@ rv = 202
 try:
     if vars_init.is_toplevel:
         builder.start_stdin_log_reader(status=True, details=True,
-            debug_locks=False, debug_pids=False)
+            pretty=True, debug_locks=False, debug_pids=False)
     if vars.TARGET and not vars.UNLOCKED:
         me = os.path.join(vars.STARTDIR, 
                           os.path.join(vars.PWD, vars.TARGET))