Update setup.py

- Use version from jwt.__version__
- Update classifiers

Author: jpadilla

setup.py

@@ -1,38 +1,29 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 import os
-import re
 import sys
 
-from setuptools import setup
-
-
-def get_version(package):
-    """
-    Return package version as listed in `__version__` in `init.py`.
-    """
-    init_py = open(os.path.join(package, '__init__.py')).read()
-    return re.search("__version__ = ['\"]([^'\"]+)['\"]", init_py).group(1)
+import jwt
 
+from setuptools import setup
 
-version = get_version('jwt')
 
 with open(os.path.join(os.path.dirname(__file__), 'README.md')) as readme:
     long_description = readme.read()
 
 
 if sys.argv[-1] == 'publish':
-    os.system("python setup.py sdist upload")
-    os.system("python setup.py bdist_wheel upload")
-    print("You probably want to also tag the version now:")
-    print("  git tag -a %s -m 'version %s'" % (version, version))
-    print("  git push --tags")
+    os.system('python setup.py sdist upload')
+    os.system('python setup.py bdist_wheel upload')
+    print('You probably want to also tag the version now:')
+    print(" git tag -a {0} -m 'version {0}'".format(jwt.__version__))
+    print(' git push --tags')
     sys.exit()
 
 
 setup(
     name='PyJWT',
-    version=version,
+    version=jwt.__version__,
     author='José Padilla',
     author_email='hello@jpadilla.com',
     description='JSON Web Token implementation in Python',
@@ -43,13 +34,16 @@ def get_version(package):
     scripts=['bin/jwt'],
     long_description=long_description,
     classifiers=[
-        'Development Status :: 3 - Alpha',
+        'Development Status :: 5 - Production/Stable',
+        'Intended Audience :: Developers',
+        'Natural Language :: English',
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.2',
         'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
         'Topic :: Utilities',
     ],
     test_suite='tests.test_jwt'