add __version__ to package

Author: miguelgrinberg

setup.py

@@ -4,15 +4,19 @@
 
 Socket.IO server.
 """
+import re
 from setuptools import setup
 
+with open('socketio/__init__.py', 'r') as f:
+    version = re.search(r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]',
+                        f.read(), re.MULTILINE).group(1)
 
 with open('README.rst', 'r') as f:
     long_description = f.read()
 
 setup(
     name='python-socketio',
-    version='1.5.0',
+    version=version,
     url='http://github.com/miguelgrinberg/python-socketio/',
     license='MIT',
     author='Miguel Grinberg',

socketio/__init__.py

@@ -6,5 +6,7 @@
 from .server import Server
 from .namespace import Namespace
 
-__all__ = [Middleware, Server, BaseManager, PubSubManager, KombuManager,
-           RedisManager, Namespace]
+__version__ = '1.5.0'
+
+__all__ = [__version__, Middleware, Server, BaseManager, PubSubManager,
+           KombuManager, RedisManager, Namespace]