add test support for py2.6 (unittest2)

Author: tbarbugli

setup.py

@@ -20,6 +20,7 @@
     maintainer_email = '[email protected]',
     packages=find_packages(),
     tests_require=[
+        'unittest2',
         'mock',
     ],
     test_suite='tests',

tests.py

@@ -3,11 +3,14 @@
 import json
 from redis.client import PubSub
 from mock import patch
-import unittest
 from tyron.tyron import application
 from tyron.tyron import subscriptions
 from tyron.tyron import RedisSub
 
+try:
+    import unittest2 as unittest
+except ImportError:
+    import unittest
 
 redis_pubsub = RedisSub('channel', 'localhost', 6379, 1)
 pubsub_channel = []