Fix small issues in setup.py

* Use absolute path when opening README.md
* Fix a pep8 issue

setup.py

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2011-2014 GRNET S.A.
+# Copyright (C) 2011-2015 GRNET S.A.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,14 +17,17 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import image_creator
+from os.path import dirname, abspath, join
 
 from setuptools import setup, find_packages
 
+README = join(dirname(abspath(__file__)), 'README.md')
+
 setup(
     name='snf_image_creator',
     version=image_creator.__version__,
     description='Command line tool for creating images',
-    long_description=open('README.md').read(),
+    long_description=open(README).read(),
     url='https://github.com/grnet/snf-image',
     download_url='https://pypi.python.org/pypi/snf_image_creator',
     author='Synnefo development team',
@@ -52,6 +55,6 @@ setup(
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7'],
-    keywords = 'cloud IaaS OS images'
+    keywords='cloud IaaS OS images'
 )
 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :