Include pep8 target with tox.

* setup.py
  Fix pep8 errors. Thanks to tox!

* tox.ini
  New target, pep8.

Change-Id: Iaa24807b4284f27918e486234c6b080fc78bc71d

setup.py

@@ -1,7 +1,7 @@
 import datetime
 from setuptools import setup
 
-ci_cmdclass={}
+ci_cmdclass = {}
 
 try:
     from sphinx.setup_command import BuildDoc
@@ -17,7 +17,8 @@ except Exception:
     pass
 
 setup(name='nova',
-      version="%d.%02d" % (datetime.datetime.now().year, datetime.datetime.now().month), 
+      version="%d.%02d" % (datetime.datetime.now().year,
+                           datetime.datetime.now().month),
       description="OpenStack Continuous Integration Scripts",
       author="OpenStack CI Team",
       author_email="openstack-ci@lists.launchpad.net",

tox.ini

@@ -1,6 +1,10 @@
 [tox]
-envlist = pyflakes
+envlist = pyflakes,pep8
 
 [testenv:pyflakes]
 deps = pyflakes
 commands = pyflakes modules setup.py
+
+[testenv:pep8]
+deps = pep8
+commands = pep8 --count --repeat --show-source --exclude=.tox setup.py