Aligning version in setup.py with package version.

Author: exhuma

setup.py

@@ -10,7 +10,7 @@
 
 setup(
     name='cluster',
-    version='1.2.2',
+    version=open('cluster/version.txt').read().strip(),
     author='Michel Albert',
     author_email='[email protected]',
     url='https://github.com/exhuma/python-cluster',