setup: get version as a string

setup.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 import os
@@ -34,7 +34,7 @@ def get_version():
         p = subprocess.Popen(['git', 'describe', '--dirty', '--match=v*'], stdout=subprocess.PIPE)
         result = p.communicate()[0]
         if p.returncode == 0:
-            version = result.split()[0][1:]
+            version = str(result.split()[0][1:])
             version = version.replace('-', '.')
             return version
     return '0'