Make 180.py executable, so I can link directly to it from ~/bin.

diff --git a/posts/Upside-down_text/180.py b/posts/Upside-down_text/180.py
old mode 100644 (file)
new mode 100755 (executable)
index ebdc23a..2649673
--- a/posts/Upside-down_text/180.py
+++ b/posts/Upside-down_text/180.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # Original maps mostly drawn from