Use python3 everywhere

colout/colout.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #encoding: utf-8
 
 # Color Up Arbitrary Command Ouput

setup.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import os
 import sys
@@ -11,7 +11,7 @@ except ImportError:
     from distutils.core import setup
 
 if sys.argv[-1] == 'publish':
-    os.system('python setup.py sdist upload')
+    os.system('python3 setup.py sdist upload')
     sys.exit()
 
 packages = ['colout']