Add Tools/scripts/patchcheck.py. Invoked from ``make check``, the script does
some verification:

- Runs reindent.py on all .py files.
- Checks if any changes in Doc exist.
- Whether Misc/ACKS was changed.
- Whether Misc/NEWS was changed.

The hope is that ``make check`` can become a command anybody can run to get
reminders about what all the requisite steps needed to create a proper
patch/checkin.
diff --git a/Tools/scripts/reindent.py b/Tools/scripts/reindent.py
index 0805ef7..65749f0 100755
--- a/Tools/scripts/reindent.py
+++ b/Tools/scripts/reindent.py
@@ -130,9 +130,11 @@
             f.close()
             if verbose:
                 print "wrote new", file
+        return True
     else:
         if verbose:
             print "unchanged."
+        return False
 
 def _rstrip(line, JUNK='\n \t'):
     """Return line stripped of trailing spaces, tabs, newlines.