Automatic version determination and check python version

setup.py

@@ -1,14 +1,34 @@
 #!/usr/bin/env python
+import codecs
+import os
+import re
+import sys
+
 try:
     from setuptools import setup
 except ImportError:
     from distutils.core import setup
 
+
+with codecs.open(os.path.join(os.path.abspath(os.path.dirname(
+        __file__)), 'aiosocks', '__init__.py'), 'r', 'latin1') as fp:
+    try:
+        version = re.findall(r"^__version__ = '([^']+)'\r?$",
+                             fp.read(), re.M)[0]
+    except IndexError:
+        raise RuntimeError('Unable to determine version.')
+
+
+if sys.version_info < (3, 5, 1):
+    raise RuntimeError("aiosocks requires Python 3.5.1+")
+
+
 setup(
         name='aiosocks',
         author='Nail Ibragimov',
-        version='0.1.1',
-        license='LICENSE.txt',
+        author_email='ibragwork@gmail.com',
+        version=version,
+        license='Apache 2',
         url='https://github.com/nibrag/aiosocks',
 
         description='SOCKS proxy client for asyncio and aiohttp',