Check in autopep8 script

maint/requirements.txt

@@ -7,7 +7,9 @@ pycurl==7.19.0
 
 # Other useful tools
 Sphinx==1.1.2
+autopep8==0.5
 coverage==3.5.1
+pep8==0.6.1
 pyflakes==0.5.0
 tox==1.3
 virtualenv==1.7

maint/scripts/run_autopep8.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# Runs autopep8 in the configuration used for tornado.
+#
+# W602 is "deprecated form of raising exception", but the fix is incorrect
+# (and I'm not sure if the three-argument form of raise is really deprecated
+# in the first place)
+autopep8 --ignore=W602 -i tornado/*.py tornado/platform/*.py tornado/test/*.py