Added publish action to setup script

Author: nemesifier

setup.py

@@ -1,9 +1,19 @@
 import os
+import sys
 from setuptools import setup
 
 from django_hstore import get_version
 
 
+if sys.argv[-1] == 'publish':
+    os.system("python setup.py sdist bdist_wheel upload -s")
+    args = {'version': get_version()}
+    print("You probably want to also tag the version now:")
+    print("  git tag -a %(version)s -m 'version %(version)s'" % args)
+    print("  git push --tags")
+    sys.exit()
+
+
 def get_packages(package):
     """
     Return root package and all sub-packages.